I have only had positive experiences with The Wet Spot, and I order from them about once a year. Once they did not charge me for a group of puffers because they didn't send out my order when they were supposed to; they were going to do it a day later. I complained and got some free fish (I had plenty of other fish in the order, too, that I did pay for, by the way). If they still have the $40 shipping fee regardless of the size of the order, it's a great deal on shipping!
It is true that they only give store credit for DOAs, which is good for one year.
I believe CCA had group orders from them, and I know GWAPA did, too. I can only speak for GWAPA, and all the GWAPA group orders were seamless.