I was looking for a flexible, smaller rig. Something that A) wasn't a ton to carry; B) had rich, warm sound; C) could cover practice and rehearsal and D) handle larger gigs w/o bulk; and E) could live in a nicely decorated finished blend into the room.
I thought I'd get a combo. Played literally dozens. And then the Shuttle hit the market. I got the 6.0 and paired it with a Bergie HT112ER. Just loved to tube tone compared to the 3.0. And I felt it was quant louder. Great "old-school" sound with new tricks. Light. "Hides" behind the arm of a sofa. Covered me for practice amp. Now I am adding a EX112ER. So I'll be able to leave one cab at the guitar player's where we practice, use the other cab for a small practice rig at home, play out w/one cab for smaller rooms at 375W w/one cab, and go to 600W w/stacked cabs for larger gigs. Plus, all broken down into two cabs, shuttle head and bass, all the gear fits in a small-ish 4-dr car. Which works for me.
For me, it's a win-win-win-win-win. Yeah, I'm happy.