This mill is very similar to the Harbor Freight 44991 that I've happily owned and used for a number of years now. The only negative (and the reason I originally bought from Harbor Freight rather than Grizzly) is that Grizzly's spindle taper is MT3. The HF uses the much more standard and universal R8.
I don't know how tightly MT3 holds mills, or how easy/difficult it is to tighten and loosen.
Be sure to check what kind of tooling, fixtures, etc. come with the mill. As is always the case, tooling can end up costing as much as or more as the mill itself. Little Machine Shop sells lots of goodies and retrofits for this mill.