I've got a variety of Airics – 2 fat Airics for car camping with the missus, 2 slim airics for winter climbing, a short airic for me in summer.
We had a problem with one which delaminated – it was replaced by Alpkit without any quibbles.
We also use the Hunka bivvy bags – I got the XL version to give a bit more room. If you're ever looking for a sleeping bag, the Alpkit one's are excellent for the price too. I think the only bit of kit I ever bought from Alpkit that I thought was totally crap was their wire handled folding spoon – it folds up randomly while eating, so I ended up gaffa taping it open.
Beyond that, all the other gear of theirs that I've used (down jacket, down body warmer, synthetic jacket, Gourdon, drybags, ti cup and socks) have all been reliable kit and good value for money.