JVC KW-XR810

Installed it in 2010 Nissan Frontier Extended Cab, along with the HD Radio tuner, 6"x9" Alpine SPR-69C speakers in front and 6.5" Alpine SPS-600's in rear.

Pros:

1. Very easy, intuitive navigation, especially for all the features, including large dedicated buttons for preset radio stations -- which was important to me since I listen to the radio a LOT. Menu and Back buttons make the nested menus easy, especially when using USB mass storage (up to 20,000 songs). Can Hide infrequently used menu options (such as AUX input) using Setup. Can readily "customize it" to meet your preferences. Once you've tweaked your setup, it's very easy to use.

2. Color matched my dash lights VERY well, with separate settings for the display and the buttons, including totally different setups for night and day. Display is fairly customizable, as well, in addition to choosing Negative and Positive backlighting.

3. Great internal equalizer provides different 3 adjustments for at each of at least 3 frequencies in each of the 3 broad ranges (High, Mid, Low) -- making it more like a 9 or 10 band equalizer. Can fine tune it to your speakers and the car's acoustics -- your tweaking is automatically saved as a USER preset that's easily accessed via a dedicated EQ button...

4, Strong internal amp and certainly not "over-rated" at 20 watts -- it will produce 20 watts with little noticeable distortion. With good aftermarket speakers, you may not (I don't) need an amp or separate sub, though I'm sure it would sound even better. Multiple LOUD settings to enhance low volume, but I don't use them -- just tweaked the EQ. You could boost the volume even more by jacking up the input volume (see #5 below).

5. Adjustable input volume for each input source (Aux, USB, CD, etc) other than the Radio, so you can get same output volume from each source without jarring (and possibly harmful to your ears or speakers) volume changes when switching sources. Even the Aux input sounds good, though it doesn't quite compare to the 24-bit Digital-to-Analog (DAC) converter in the headunit.

6. Clean, great sound, though I didn't try it with just the stock speakers. With all the adjustments, you can tailor it to the type of music you typically listen to. Surprising bass with these nice Alpine speakers. The stereo in my truck now blows away the Pioneer/Bose setup in my house!

7. Attractive, without being flashy. Looks almost stock... hopefully won't attract the attention of thieves!

CONS:

1. Couldn't transfer phonebook from my old Casio Boulder. Easily paired up to it, and Bluetooth works great otherwise. I just dial out using Phonebook on my cell, and the headunit takes over. Could still manually dial using headunit, but it's more cumbersome. Sounds great -- callers say it sounds like I'm just using a headset, without echoes, road noise or other distractions.

2. Didn't recognize my Sansa Clip MP3 player - perhaps because I also have a micro-card in it. Bought a 8GB USB flash drive that works great, and use it on the rear USB, hidden in glove compartment. (The tiny Bluetooth adapter stays in the front USB and isn't very noticeable at all.)

3. File names and folders still limited to 25 characters, which initially required some renaming of the files. This has little impact on the display, however, since the Tags (Artist, Album, Song Title) can contain up to 128 characters. Can select to scroll long tags once, repeatedly, or turn scrolling completely off.

4. FM radio reception isn't really any better than stock, though the sound is clearer with less static on normal AM/FM. AM reception seems better than stock, and much clearer overall. HD radio sounds GREAT, though HD stations and their range are still limited. I saw HD as an investment in the future, without subscription charges, especially since the FCC just recently approved the HD stations to increase their broadcast power (i.e. range) ten-fold or something like that.

5. Glossy faceplate and buttons show fingerprints and dust, and makes it look "less stock" than it would if it had a textured finish. Otherwise, matches stock dash very well. At night, with the colors adjusted and stored via setup, it looks like it came from the factory instead of having a multi-colored light show...

Overall, I'm VERY, VERY pleased with the upgrade. The improvement in sound (not counting flexibility of two USB inputs, AUX, HD radio, etc.) over the stock single-CD (non Rockford-Fosgate) system are simply incredible. IMO, this JVC has the most features available at this price point in a double-DIN deck, and the sound won't disappoint!

I have had this for about 4 weeks and enjoy the warm sound it provides (thanks Burr/Brown DA converter). The Bluetooth feature is the most impressive as it allows you to talk (handsfree) on the phone and stream your favorite tunes from pandora/spotify etc on your tablet, smartphone, or ipod. It's extremely versatile. Love this BT feature that simplifies my life! The unit comes with preset EQ settings but to fully appreciate the warm sounds you have to use an amp and utilize the unit 3x RCA low-level output. Recommend pairing this with an alpine Class D amp.

I was happy when I first bought this unit, but I have recently hooked up an amp and subwoofer through the subwoofer preamp outputs. My problem is that the bass is way too low, I'm running a 1000bd fosgate mono amp and 1 of P3 500 rms sub. Amp's gain is all the way up so on the stereo.

Honestly don't have much to compare this unit too but it is nice so far. I was a little concerned about the lower freq. response only going to 40Hz but seems to have plenty of bass with my subwoofer.

Bluetooth microphone seems to be what can be expected from my experience. Not great but it works.

Having some problems with unit reading my iPhone 3G. Seems to be a specific order of operations that must be followed or you will get "read failed" messages constantly.

Love the features. Very easy to use.

I replaced the stereo in my 2003 Ford Super Duty pickup with this unit because I wanted something that would interface to my ipod and cell phone. This unit came with everything needed to do both. It took minimal modification to the dash to install the unit. It looks good in the dash, you can match the illumination color to the vehicle's OEM illumination and it has tons of EQ control. Could not ask for more. I'm totally satisfied and would advise others to purchase.