Another happy Grizzly G490X owner here. It was about 1/2 the price of the Powermatic equivalent at the time I bought mine.
At the time I bought mine there were several threads here at SMC where owners of the Grizzly's were experience loose pulleys. So when mine arrived before I even turned it on, I removed the set screws from the pulleys, put a little blue Loc-Tite thread locker (removeable type thread locker) on them, reinstalled and tightened them. I haven't had a problem with mine.
Ken
So much to learn, so little time.....