I live here in Germany where TAD's are really popular. They are designed here and manufactured in China. I used them for quite a while but couldn't really get them to work for me. They do have a new EL-84 power tube called the EL-84STR which I really liked but still found JJ's to be far superior. The cleans are ok but there seemed to be loads of headroom before you start to get a useful overdrive setting. They are decent tubes, but nothing to write home to mom about. I prefer JJ'S.
Although, I have seen a ton of Fender players out here that prefer TAD's.