As for the quality of jWin, I had one of their boomboxes, which sounded quite nice (thgouth headphones). It had tons of features...mp3 playback from cd (which sounded very nice), an aux input (I used it as a bedside headphone amplifier, for XM and audio from my "netbook", an Asus eeepc), a USB port (it could play mp3s from a thumb drive or external hard drive), and an SD card slot. The tuner was even decent...analog tuning with a digital frequency counter, which seemed to be "spot-on". The AM secsion even sounded very good, and was reasonably sensitive. What's not to love? Well, the display quit working after just a few months. A pity! I replaced it with a Presidien I picked up at Radio Shack, which has all the same features, minus the SD slot and USB. It also sounds very nice, and so far no problems with the display.
Interesting feature of the Presidien AND the jWin, something which consumers should demand...they play through track breaks on audio cds with no pause or delay...shockingly rare these days, and crucial for albums like Dark Side of the Moon, the "second side" of The Beatles "Abbey Road", or any live album, where audio continus through the track breaks! EVERY good cd player used to be able to handle this simple challenge. These days LOTS of players can't! I won't own a player that can't do this!