I had a custom Atlan suit and after 6 weekends the neoprene all shrivelled up. It was then so tight (primarily in biceps and calves) that I couldn't wear it anymore. I was not a case of weight gain. I took it back to my LDS and they sent it back. Altan agreed that something had happened to it but figured I had done something to it. I had only washed it with wetsuit soap in cold water, hung to dry in the shade, stored it hanging up with nothing touching it in a closet the furthest away from the furnace. I still don't know why it shrivelled. Personally, I think it was a crappy batch of neoprene but they said they didn't think so. Even though it was under warranty, they didn't agree to replace it. I eventually struck a deal with them to get a new suit in a different style (jumpsuit and sleeveless shorty). I paid for the sleeveless shorty part only.
I just tried out the new suit yesterday. It seems fine but I did order it a tad bigger than I need so if it shrivels again, it'll still fit (hopefully). Neoprene seems much stretchier than my shrivelled suit. Other than my experience, I haven't heard anything bad about them but if I was to buy a new suit again, I'd go to BARE as they have taller sizes (which is all I need) and not to Atlan. I hear BARE will be doing customs suit this fall.
Diverlady