Bill, I have this mill, only maybe an earlier version. Mine is pushing 25 years old, or thereabouts. Iam very happy with this machine. It is plenty heavy duty for most any hobby work and should give you excellent service.
If you are looking at a used machine, pay close attention to the in and out movement of the table (into and away from the column). Sorry always been confused what axis this is... anyway, on my mill, the leadscrew nut comes loose from its mounting position from time to time, and the table jams. This requires weaseling in underneath the table with a socket wrench and tightening the bolt back down. It's also possible the nut becomes worn, causing the jammed condition, requiring a replacement. Grizzly parts and service and supberb.
Second thing, after many years, the belts become frayed and worn. Not a big deal to replace. However Napa Auto Stores carry a good, inexpensive heavy duty lawnmower deck belt replacement that is a lot cheaper than Grizzly and other machine belts. Seems to be the same belt, near as I can tell.
Third thing : Some people don't like the round column. Some say it can throw the head off alignment with to heavy a cut. The end mill grabs into the work and the power of the machine causes the head to twist and embedd the cutter into the work. So, don't take monster cuts climb milling and you will be fine. The round column isn't an issue with my machine.
Anyway, I can heartedly recommend this machine model.
Glenn