I've have 2 GooLoo's now for 5 and 6 years for our family of vehicles. They have both worked great, with no signs of problems. I used one on my wife's co-workers car the other day when she got stranded at work with a bad battery. Got her started right up and got her to the auto parts store for a new battery. The girl told her father about it and he ran out and bought her one to keep.
In saying that, I wouldn't hesitate buying a Noco brand, when needed.