The 100.2 isn't real tubey or do I think it will fool you being a tube amp but it doesn't sound like a lot of SS amps either; it has no edge to it. A lot of tube amps are starting to sound more like SS amps these days so maybe it is somewhat accurate to say it sounds like a very neutral tube amp.
I took home an ARC hybrid HD220 that I compared my 100.2 to and that amp retailed for around $9K! Maybe I can't hear but I preferred the 100.2. The HD220 was lifeless to me and didn't have the magic the 100.2 has. Be surprised if anyone on this site who has or has owned a 100.2 thinks that amp isn't a really nice amp. Yes the HD220 went back to the dealer and I eventually ended up with a Pass. I have owned tubes and still enjoy tube amps but I don't want to deal with the cost and maintenance of them. Tube preamps are a different story; tube life is much longer and cheaper to re-tube.