I use the Proma 150 and it works great.
The problem that we all had was the Masso controller needed a bug fix, now that this has been done all is OK!
Masso has spent a lot of time with me on Skype to get it right and I think they have nailed it!
In my thought the Masso and Proma 150 are a good solid working unit. (simple to setup the THC as well)
Have a look at my videos in the forum or on "YouTube if you search my name Ross Woolley "
Good luck and some of the other users will comment soon.
From Ross.