I've used them several times, and they've been fabulous: punctual, startlingly efficient, and almost ridiculously careful with my stuff. (Far moreso than I would be if I was moving it myself.) Zero complaints from me.

They're basically the gold-plated option: the best movers at the highest price. Consider them a benchmark -- you should *never* pay more than them, and if somebody else is anywhere close to their price, probably go with GG instead.

Also, note that they *strongly* favor the estimate-high side. As far as I can tell, their estimates are built around the typical movee -- badly-organized and maybe not quite completely packed. I'm one of those people who is careful to make sure everything is in good boxes and labeled by the time the movers arrive, and as a result they've always come in considerably *below* the estimated price.