Yeah Joker
I have had two of these units, but I bought the identical from *****.
The first one only seemed to work ok. My problem was it tended to wander off frequency and had to be changed about once every 1/2 hour (which is easy) or so around town. Out of the city it was fine. It was stolen and I replaced with another unit and this one works much better, I never have to change frequency now.
I have only used 1 or 2gb SD and same size USB and both work fine. I actually travel with a couple 1gb SD with different mixes and it is super simple to change.
One cool feature also is the jack. I have music on my blackberry and have plugged it in also. I really don't play around much with it but it just linearly plays songs in order 1-100 or whatever with forward and back buttons. The remote works great but I never use it.
You don't have to turn the volume up but this is a YMMV since the first one I had needed to be up more than the regular radio. Personally, this is a $10 unit and worth every penny. It is not a $100 unit priced at $10 but surely is as good as any $50 unit that me or my kids have tried.
One or two other comments: Some times you do have to advance a song if the unit gets "confused" - don't know if its a card, the encoding or the unit.
I'd buy another in a minute. I have bought mine from ***** in the past but they are a little more.