Oh yeah, So Far my Cheapo Harbor Freight spot weld cutter has been performing great, Requires a center punch first and start off slow or it tends to wander but otherwise works great! My 7 year old recorded this so don't mind the yelling.
http://youtu.be/6wSNUIux3t8
I did break one of the spring loaded pins in the center of the cutter after about 200 spot welds but it was one of those where it started wandering and probably led to the breakage who knows