My wife and I have been using a pair of large BA Insulated Core pads for about 5 years.  No complaint in the comfort department.  There is no comparison to my old thermarest foam pads; these are head and shoulders beyond.  However, this past season they both started to leak, a slow leak to be sure, so that by morning they would have lost about a third of their air.  So after our last trip of the season I figured it was time to replace them and got a couple of Thermarest Neo Air pads, which, by the way are super amazing - lighter and smaller to pack and far easier to blow up.  But as an after thought I figured maybe I should try sending the BA pads back to the manufacturer on the off chance that they could either repair or replace them - though, either way, after 5 years of use I didnt have much hope.  So I mailed them off and heard nothing back and figured  that was the end of that.  A couple of weeks ago I got around to calling them and was very surprised to hear that they had my pads and, having tested them, found the leak to be a manufacturing defect and so they would replace them free of charge with two brand new ones.  I was mightily impressed.  Not many manufacturers would honor a guarentee after 5 years of pretty rugged use.  
As a side note - I now have two brand new pads that I dont need so if anyone is looking for a pair of BA Insulated Core pads at a good price, let me know.