Akai Professional MPX8 by Kiskadar
1.The MPX8 has USB but does not register as a drive unit so you have to take the SD card out and insert it into a card reader.
2.Many MPX8s can only load up to 15MB of samples, not 30. This is a hardware issue.
3.The loading times for kits with long samples is terrible. You had to have multiple MPX8's to solve this problem when playing live, so that you could play one song, while the other MPX could load and be ready for the next song.
4.You can't turn the pressure sensitivity off for the pads.
5.No "choke" function. Nice would be a function that enables me to hit one sample and stops it automatically when I hit the next one.
6.It doesn't support MIDI Running Status messages.