You'd get a more accurate answer by inquiring about a specific model of a tool.
I've bought good bandsaws from them, and it is my (academic only) belief their top of the line models in (at least) lathes and bandsaws would compete against the premium brands' higher offerings.
That being said, I have bought very cheap things from Grizzly including some iron clamps where the casting cracked within a month. So, you have to do your research. It's not a brand where everything is created equally.