OXI Instruments One MKII Black Edition

The truth is: this the best sequencer money can buy right now.
That said, it's really expensive and very complex.

After two months of using and learning it, I found two main issues:
1. The sequencer has some bugs - I assume they'll fix them later.
2. There aren't any good, in-depth tutorials on YouTube. For some reason, the company's official channel makes "artsy" videos where the "art" is the focus, instead of proper deep tutorials - which you'd expect for such an expensive and complex product.