chiming in
I thought I'd add my two cents' worth, as I have played mostly with the POG OS for the last five years, while mixing in both the C10 Pro and most recent Extreme Pro version in the last two years.
Here's my take on feel, performance and stringing. For context, I am a fit, middle-aged, athletic guy who started playing tennis seriously ~5 years ago and competes in USTA league 3.5 and 4.0 singles. All-court game, mostly SW forehand and 2HBH but hit lots of slice and sometimes hit 1HBH (heavier, harder shot than my 2HBH but less consistent).
C10 Pro
My current favorite. Stock + Gamma leather grip. Softer poly (Gosen Polylon SP) at 35-40# is working best for me. Static weight similar to POG OS but much faster through the ball. Find I can hit both good topspin and flatter more penetrating groundstrokes. Can really thump both 1st and 2nd serves with this racquet. Great soft feel and I feel very confident at the net with this: caressing volleys, consistently hitting drop shots off both sides that I wouldn't even bother trying with the POG OS or any other racquet, going after overheads without fear, attacking swinging volleys, etc.
POG OS
Still go back to this one often. Sharper/crisper/zingier feel than C10 Pro. Heavier feel (diff. balance and slightly higher SW). Nothing hits loopy, heavy, deep groundstrokes like this racquet, but unless I am absolutely in the zone, I have a hard time hitting flatter, penetrating shots with it. Good on slice serves for me, less dependable on flat first serve, hard for me to generate enough racquet head speed with it to hit a decent kick serve. Basically hit some variation on slice serve all the time with this. This racquet means business and if I had to play to save my life, this is probably the one. Stock, mostly play with Polylon SP at 45-50#, have played with multi, full gut, syngut, hybrids…it's awesome with all. Feels feel good at high tensions with gut or multi.
Extreme Pro 2.0 IG
Demoed this twice last spring and thought I'd found the holy grail. I returned it to the shop with the judgment, "It's a modern POG OS." Bought one and started playing with it all the time. Stock. Feels soft but its RA is high and I did develop some wrist and elbow pain while playing with this for a couple of months (with Polylon SP at ~40# and with syngut around 50#). Very, very similar to other popular racquets in this category (esp. APD, PD, PDR) but feels much better IMO. Great spinny serves, great spinny groundstrokes and, like other stiff, thick-beamed racquets, puts volleys away with additional zip. I'm sure there's a reason the PD and all imitations are so popular with tour doubles players -- if you put one of these sticks on the ball properly at net, that ball is going to be drilled. I fell out of love with this racquet but could still play well with it. Concerned that it might have contributed to a bout of tendinitis.