Just a quick tip before you buy: look at page 29-34 of the manual. There you can see which parameters are available on the matrix, and which are located on pages that you scroll to from these matrix points (the whole synth engine menu is arranged in tons of pages that you scroll through, starting at Oscillator 1 and all the way to Arpeggiator Length, with the matrix points working as shortcuts/performance controls in between).

To me the interface is a letdown on this unit. It’s sort of a compromise between performance and editing which doesen’t really work too well. While I haven’t really used the XT, it sure looks a lot more hands-on and intuitive to edit.

But!

The synth engine/sound is really good and weighs up for the shortcomings of the interface. And regarding bugs, I can’t remember encountering any (I use it monotimbrally).