I have never had a problem with Asda for normal negative film. In fact, they are my prefered choice of shop for normal film.

I'll get Harrison Cameras to do it for me. They are a nice little shop who will know what they are doing (I took the film there to be developed).

I have never had photos with quality control stickers on though. What sort of photos have they appeared on? I have had plenty of crap photos, mostly ones which have come from my Kodak Star EF. I don't think it winds the film on properly for some reason. I'll have to investigate, although there isn't much that can go wrong with it when you have to wind it on manually.