I've been using my Ion brand TTUSB10 turntable for a little over a year now. It came with softwear called EZ Vinyl Converter (which makes direct transfers unedited) and Audacity (for cleaning up track noise and other mods). I've almost never used the Audacity softwear, since a mild amount of vinyl noise (to my ear) isn't a minus and is usually a plus when listening to music. Also of you have a major amount of noise that softwear is too labor intensive, because you have to manually remove each pop/scratch noise.
I have a lot of music that isn't available on cd, let alone digitally. This USB turntable is invaluable for that stuff! The one thing I haven't done yet is try and transcribe a couple of 78s I have. Audacity has a speed conversion that can do that, but I've got so much vinyl in 33 and 45 rpm to transcribe I haven't gotten to them yet.
To use my softwear you have to have iTunes. Once you have the album/song in iTunes you can use it to export or burn an MP3. Either way it's very easy, although I've never exported an MP3 except to my iPod using iTunes. I used to use Windows Media for MP3 players before I got an iPod. If your softwear is not working for MP3 exports, you might try exporting to Windows Media and then to an MP3 player.