I love the idea of them. I might eventually replace my Sys8 with a JupX once the resell value drops.
To me it's almost like a mix of the JD-Xi and the Sys8, both of which I have owned and loved. I only sold the JD-Xi because it required the software to really get they most out of it's power, and it's keys were just... no.
I don't know that I really *need* drums in my synth, but as a former/sometimes drummer, it's always something I appreciate.
On that note, Roland's new MC-101 and MC-707 look like the grooveboxes I was praying for 3 years ago when I got into synths/electronic instruments. I've heavily invested into the Native Instruments ecosystem, but with their latest news... I might have to consider replacing my Maschine with a 707...