I don't own one, but I had a Studio Pro 22 then exchanged it for a 35. I regret letting that amp go because it sounded damned outstanding. It does make a great pedal platform, but only everything from fusion to hard rock. I don't like the way it compresses with overdrives set at full gain. You need a very high quality distortion pedal to start getting some metal sounds from it. I doubt anyone uses them for metal, but they can sound quiet good for a lot of Vai, Satch, Bonamassa, etc. types stuff.
The Sensor 35 lends itself better to heavier styles. However, Two-Rock customer service is outstanding and they'll customize your amp for you if you ask them. I once called them about a Sensor 35 that I wanted to buy and they said that if I didn't like it with 6L6's, they'd change it to EL34 for me. That's pretty cool.