There's a thread on talkbass where a few people who've bought them talked about their experiences http://www.talkbass.com/threads/hotone-thunder-bass-anyone-heard-of-it.1074630/
They seem to be pretty cool given you understand the limitations of a 5W head
My LMIII with one of the old Barefaced Compacts works pretty nicely. Bit of warmth and very, very clean, which some people may not care for. I'd definitely recommend the LMIII if you want a clean amp with relatively little colouring; it's a nice little bit of kit.