That’s the controller that I went with for Drambo, it’s good but not 100% perfect. The main frustration was that I couldn’t set Drambo up so that as I switched tracks in Drambo, the mapped controls would switch between tracks (like how it works in Logic). This is a Drambo limitation really, but the Atom controller didn’t have a nice way of switching midi channels with one press to work around the issue. The second frustration was that the endless encoders on the Atom SQ don’t send relative CC values, so despite being endless you have the usual issues with value pick-up.
On the plus side, I found the set of controls the Atom SQ had to be a very good fit with the capabilities of Drambo.