It has good sound quality, but as a device, the quality is low. It has no comparison to the old mp3 players that weighed three times more. I installed it in a 2001 VW Polo and
1st. It doesn't turn off from the button as the manufacturer claims, no matter how long I hold it down.
2nd. It doesn't save station presets or personal settings. When I turn off the car and turn it back on after a while, all the radio settings have returned to the factory default. Pioneer is good otherwise. Five stars. Personally, I am disappointed with this choice I made. I bought it mainly because its lighting colors match perfectly with my car's.

I have had it for about a month on a Peugeot 307. Everything is fine, except for the buttons which are small and difficult to read, especially for older people! And in order to connect it wired to the steering wheel controls, the electrician who installed it told me that I need an adapter, costing about 150 euros additionally! Other than that, everything is good.

I bought it today.. it excels in many aspects... I had an AKAI, I had bought it 20 more than the Pioneer...
much better sound.. louder and superior bass..
and at any volume, there was no distortion... I really enjoyed it
I highly recommend it to those who want an affordable solution for their car.

I bought the Pioneer DEH-S110UBG exactly 1 month ago, and I am satisfied so far with both its performance and the sound it produces! The USB supports everything as long as it is in mp3 format! And good price and of course Pioneer!