It took me years to find a good deal on a Tenori, which I in turn, quickly sold. (physical buttons were no more rewarding or inspiring than the iOS version) Then I upgraded later to a chrome one for about the same $200 investment. To this day, I'm more pleased with getting a good deal, than with acquiring a new item for the toolbox.
For me, matrix sequencers are great for art installations and triggering other MIDI gear. I like setting them to random and just letting them surprise me, while I tweak various effects boxes. That being said, I rarely take my Tenori out of the case. ---If people are used to composing with a guitar or a piano, then I see why they'd fail to connect with a matrix sequencer, because they don't need or want to visualize the patterns. There's no comfort or familiarity there, without the physical routine they're accustomed to experiencing. A Tenori seems to appeal (for most) as a means of sketching or experimenting, rather than solidifying an entire composition.
---continuing on #NNIHIFAD, I need to bust out my Fairfield fuzzes and run my CR-68 through them. Those guys are needing some attention.