Alphatig - same as an Everlast. If I had to chose between the two, I'd go with the Everlast. They at least have some support in North America. The Canadian rep is the guy who goes to China and specs out the units, the changes and runs the tests. So at least there are some North American "boots on the ground". The others are probably just repaints. Everlast has a good website with forums that are worth checking out.

FWIW I do not own an Everlast - but I came close!