Hate to be so agreeable, but I agree 100% w/ phread59....
I've had no real problems w/ other brands ( well except for the Great Pains varities) but Zap seems to be a notch better, and at the same price, it's hard not to choose it. Bob Smith ( store brand) is my 2nd choice, Jet third, most others 4th, and if my only choice is Great Pains/Hobbico, I don't buy.