I have had mine for just short of a year, so can offer a couple of comments on that basis. As a late middle age novice woodworker (this was my first table saw purchase), I have used it for about 20 cuts a week over a range of hardwoods and plywood. I've noticed a few things that are consistent with many of the reviews here. In a little more detail,
1) Fairly solid construction: the G0715P weighs in at close to 400lb, so in that sense is not hugely less robust than a full on cabinet saw and shares the obvious dust collection advantages. The table wings and surface appear flat to within 2-3/1000ths (as tested by good straightedge). The trunnions appear substantial enough for their contractor-like design and hold adjustment well for me over several months (tested by measuring miter slot to blade distance using an A-Line-It). More subjectively, I also think it's a good looking piece of machinery once you remove several of the unnecessary stickers that decorate it new.
2) Good reproducibility of cuts: after taking the time to set up a ZCI and align the fence properly (again, alignment tool with a dial indicator), I find it fairly easy to reproducibly shave slats of about 1/8"-1/16" constant thickness from a jointed piece of wood. Maybe it's more a tribute to my miter gauge (an Incra 1000HD), but the length of crosscuts is good to within a couple of thousandths over repeated cuts, too.
3) A few annoying alignment issues: as also noted by one of the most helpful reviewers, the blade raising/lowering wheel on mine rubbed on the cabinet before I shimmed the table top up a bit. (Rather than doing washers at the mounting bolts, I used some longer lengths of flat brass shim stock from Grainger; problem solved entirely.) I haven't yet locknutted the fence adjustment screws, so I periodically check miter slot to fence parallelism, too.
4) The major annoyance was the variation in blade to miter slot parallelism that several people noted. Mine is in the 10 1000ths range from blade completely raised to blade 3/4" above the table. After about a month of back and forth with Grizzly customer service, I finally surrendered and am just living with it. (At the end of last summer, they just declared victory and went home for people with problems like mine. I think it's probably different if you have a 60 thousandths problem, as some others have had.) Obviously, it hasn't killed the reproducibility of the cuts for me and I don't think it's a crisis since most of my work is done on 1/2" to 1 1/2" stock anyway.
5) My saw sometimes bogs a bit on thicker hardwoods, but I attribute that mostly to the current 110V setup and not the parallelism problem. I am generally very happy with the Infinity 010-060 blade recommended by knotscott (thanks for the informed reviews!) and would wholeheartedly suggest a thinnish kerf if you are also running 110V.
6) Also rans: The ShopFox D2057 base I got is adequate and came with a couple of pre-broken pieces, but was RMA'd without incident. The miter gauge, as noted by other reviewers, clearly is not up to the quality of the rest of the saw.
Overall, to me the G0715 is a solid piece of equipment, but shows some of the rough edges you might well expect of a saw that costs one third of what a Powermatic/Unisaw/Sawstop does. Given a good dial indicator alignment tool, my experience is that it can reproducibly be tuned and maintained to a good standard. Having added a decent blade, ZCI, and aftermarket miter gauge, I anticipate being happy with it for the next few years.