As long as you are
As long as you are not expecting this amp to become your primary rig, I don't see how you could go wrong with the Spark2. This is the most versatile (and just plain fun) practice amp I have ever owned.
The gazillion different combinations of sounds available through the app do a great job of stirring the creative juices and the line out function makes up for the Spark's lack of oomph. I have it running through my board into a half stack loaded with Celestion Greenbacks and it sounds fantastic!
While I cannot play like Satch and Vai, with the Spark2 I can sound reasonably close to them. Zero complaints!