LOL... boutique amps are like super models. Once you've had a couple, you realize that personality rules over all!
Anyways... I had a UL for about 8 months and then sold it. Used it at band practice and gigged it several times. But we were doing mostly hard rock and the Bogner XTC that I also had at the time just had more personality and vibe for my tastes. The VHT was a very good amp. Just didn't reach-out, grab me, and say "you GOTTA keep me!"
Obviously, I am in the minority on my lack of affection for that amp. Certainly didn't hate it. Just never excelled for me (even with a tube swap). Was more versatile than the Bogner Twin Jet that I also had at the house at the time (was a buddy's), but the TJ sounded girthier and had more personality as well to my ears.