I picked up a used mk1 last September.
Fantastic box. While it’s one of the most basic synths I own and the sampler aspect is almost laughably basic, when the two sound engines are combined with each other and then interact with the sequencer and the rest of the sound architecture (fx, multi gain staging, etc) it becomes so much more than the sum of its parts. I never “got it” by reading the specs but I do now that I’ve used the thing.
Do I have complaints about it? Sure. Tons. That’s the nature of my relationship with gear in general.
The one thing that drives me nuts regularly is that it doesn’t resample. I find myself using multiple pads playing in unison to make a drum sound out of lots of layers and I really wish I could condense them down to a single pad once I have them dialed in. I probably should have bought the mk2 but that’s the only feature from it I truly lust after.