Very cool system. Navigation is a little cramped with main knob and small words around knob. Hard to read while driving. A little complicated then less equipped models. Sound and features are very well worth it. If you have iPod or iPhone you can play music wirelessly through bluetooth, Sweet if you ask me.
Sound is great!!!

I agree with most of the reviewers. Not User friendly. Volume knob is slippery.
Not fully compatible with some phones:
Motorola Q9c, Bluetooth hands free does not work, Audio works
LG enV2 (VX9100)Bluetooth hands free does work, Audio does not work
T-Mobile G1 (the Google phone) fully compatible.
I called Pioneer and they basically said "it is not the stereo's fault sorry there nothing we can do".

Please post other phones that are fullly compatible with this head unit.
Thanks!

Before i bought this product, i was fully aware of the capabilities of a pioneer car stereo, as usual, they didnt disappoint, controls are a little tricky but worth the performance, as soon as you get used to the controls, its like phone calls and music just had married to live happily ever after with unmatched bliss, the audio switches from calls to music in an instant as soon as the calls are done, want to redial, press a little button, want to switch to another incoming call? tap a little button, everything is up there on an engineering ritcher scale. Inbuilt memory is surprisingly spacious, save greater than 500 phone numbers, know who's calling without taking your phone out the trunk, switch to private call if your cheating on your girlfriend while she's in the car, set and adjust audio settings till you start wondering why you missed that physics class, easy ipod connectivity with inbuilt mp3 sound improvement to CD quality, sound output; very impressive.
Downsides; i wish the display was full dot OEL, rather than LCD, i didnt see the point though, because the version before this(DEHP5100UB) has full dot OEL display, but without an inbuilt bluetooth connection, the reason i picked this one, the buttons are a little tiny and awkward but effective.

I was looking for a bluetooth stereo. I reviewed countless different products before deciding on this one. This one fit the bill perfectly. The clarity is wonderful. All of the options work as advertised. When I am talking via bluetooth I understand the conversation and the people on the other side understand me. I have not heard one complaint about the quality of reception. I drive a car with no carpet or matting (due to recent flooding), so the cab is pretty loud, yet no one has complained. The other options work well too. The only drawback to this model is that you REALLY need to keep the manual handy. It is not easy to navigate through the options unless you have your manual. Pairing was easy with my Blackberry Storm. If I was looking for a stereo I would buy this one again.

I know very little (emphasis on little!) about car stereos but i knew i did not like my factory installed stereo. I wanted something that would play my Ipod. Finally after some research i found this stereo. I wasn't looking for bluetooth but then i saw this stereo online and figured why not add the bluetooth. I checked it out at the store first and bought it here, about $70 cheaper. So far it has been a good product. The Geek Squad installed it and gave me a quick "how to" demo. The stereo is easy enough to use that i figured out how to do a lot of things without help of the manual. The bluetooth works awesome with crystal clear calls. My only real complaint, and one that i have seen in most reviews is the super sensitive knob. I can't press it to make a selection without hitting up another direction (up/down/left/right). Maybe it just takes practice but it is a dangerous if you are trying to figure it out on the road.

All in all.. great product. Couldn't have asked for a better a product considering the deal i got on it. It made my little clunker just a little bit more stylish!