I've got a Reg Airic, and am very impressed with it. I'm not exactly skinny and tend to sleep on my side, so wanted something decently thick on the basis that I'd rather lug the extra weight than not sleep properly. I've used it successfully for a couple of cycle-camping trips, and have lent it to a people for sleeping on the (fairly cold) floor purposes a few times, with absolutely no complaints.
Our sofa-bed recently coughed up a Thermarest (I forget the exact model, but dimensions are similar to the Wee Airic), which I eventually determined belonged to a friend who visited several months ago. Out of curiosity, I let it inflate and tried it for comfort. It's about half the thickness of Reg Airic, and lying on my side is impossible without uncomfortable hip pressure, so I reckon I made the right decision.
If you can happily sleep on your back, or really care about the packed size/weight, then Reg Airic may be overkill, but otherwise it's an excellent value general-purpose mat.
