Yeah I've heard a few music store dudes give the Thermion a bad name.
I just think they just weren't sure how to use it. Because I know of a few people that can get great tone from it.
It's voicing is slightly scooped so it's sorta like a cheaper dual rec (also seeing that the Thermion cab has V30's like the rectifier cab).
But it's a bit unreliable when it comes to fuses blowing at venues with unstable power supplies.
I posted my gear in this thread:
http://www.guitarforum.co.za/your-gear/i-love-my-gear/105/
The picture is a bit outdated though got a new guitar and other things added since then.
For metal I had no problems.