I picked one up today in the G22 flavor. A LGS had just received a few and I was there. I couldn't resist. I immediately took it out to fire it today (without cleaning or lubricaiton). I shot 100 rounds of mixed ammo today (Winchester Ranger, Winchester PDX, Winchester WB, Federal, all 180gr), all was accurate (only took it to 25 yards) and fired without mishaps.
You do have to get down kinda low on the tube to see the sights and get a good picture, but they aren't that bad for close range. I'm not going to do anything custom with it, just cut some hose as previously advised and cover the tube because it gets very warm when firing a lot.
Next week I am going to take it to a sight in range and fire it from a bench to see it's total accuracy potential.