I've got one in 1/2".
It doesn't get used daily. Doesn't even get used often, but when it does, I'm damn glad to have it. For many of the things I use it for, the only alternative without was the good old fashion human powered tool. (Mine's broke, and waiting on warranty replacement
It is not a high powered tool, but that does not mean it is without use. Periodically I encounter a 5/8" bolt it will not loosen. The ones that it will not loosen are sufficiently tight that the 18 inch breaker bar is necessary to break them by hand (if they were reachable with a standard impact, I wouldn't have attempted to use this tool in the first place.)
As I have observed mine, I would say it's torque capacity is comparable to that of a mild 3/8" impact. Still, that usually is enough, and that is inline with how it is advertised.
A behavior I have noticed (and taken advantage of), is that the right angle mechanism appears to apply a drag. Enough so, that when you let of the trigger, the anvil does not really freewheel. It stops nearly immediately, as if the tool had an anvil stop feature (to the best of my knowledge, it does not). I have been taking advantage of this by using this thing for some disassemblies in which I would desire an anvil stop feature to avoid throwing fasteners, until such time as I get an MG series SO impact.