Kinda depends on how you define close.
Not to be confused with Stonewall in eastern PA, Olde Stonewall is a Hurdzan Fry effort in Ellwood City, PA (most definitely western PA). It's about 45 minutes north of me, I'm about 20 minutes north of downtown, Oakmont/FC/PFC are probably 25 minutes east of downtown. You might actually be able to make it pretty quickly from the big 3 to OS due to a nearby interstate, but it's probably still close to 50-60 minutes.
I'll give you my 2 cents, but be forewarned that I'm probably the least traveled & experienced regular poster on the site, so take this for what it's worth.
Tee to green I did't feel like OS was anything special, particularly in light of the high greens fee (for western PA - $85 off season, I think $135 in). Like virtually all of the region, the terrain is pretty severe, but I didn't really get any great enjoyment from tee shots & approach shots. Approach shots are mostly from flat land & relatively flat stances - my completely uninformed guess is that they smoothed things out quite a bit.
Having said all that, I think the green complexes are among the better public ones I've played, particularly in western PA. Pretty decent movement in greens, including a few fallaway greens. My playing partners really struggled with putting the day we played. I thought it was really fun, once you got around the greens.
The course is proud of the use of the indiginous (sp?) stones - I didn't really care for them, though I don't find them quite the eyesore that many on this site likely would.
I was just about to say the front nine is pretty bland, but I remembered that we teed off 10 to start the round, so I guess it was the back that was more bland. There are back to back par 3s (I think maybe 14/15) that are less than stellar if you play the normal men's tees. Others have commented that these are much better from the tips. I wouldn't know. I'm mediocre golfer & if I'm not playing with friends who automatically head for the tips, I try to play the tees suitable to me.
"Aesthetic" issues: I think carts are mandatory. The clubhouse is a faux castle that looks a little like something I could throw together by heading down to Home Depot. There are a handful of steel silhouette cutouts of various wildlife scattered around the site - maybe the weirdest thing I've ever seen on a golf course, as far as accoutrements go.
All in all, not a bad course, but I would definitely go to Quicksilver before I went back to OS. The greens probably aren't as good, but I enjoy the rest of the course more. It's also less than half the price.
If I were going to kick up the cash to go to OS, I'd probably head instead to Nemacolin Woodlands to play Mystic Rock, the only Pete Dye course I've played, 2 days after I got married, no less. I think it's way better than OS & in the same ball park, money wise. It's a bit further for me - OS is about 45 minutes north of me, whereas MR is about 90 minutes southeast.
All these questions have definitely got me fired up to get out on the ole golf course - tomorrow's supposed to hit 60!!! Woo Hoo!!! Time to lace up the gaiters & slop through the mud.