Copped the Roland Rubix 44 a few months ago. There wasn’t much literature out there on whether the rubix series of interfaces play nice with Linux / Jack / Ardour so I thought I’d chime in here.
It works great! Not a single problem so far, and a huge improvement over using my Novation X-Station synth as an interface (which also worked but was subject to little artifacts and a whimpy headphone amp).
At 192khz sample rate, I can get 1.3 ms latency. Virtually noise free. Highly recommended. Only regret is that the 44 is a bit overkill compared to the 22 or the 24.