I've had really good luck with my fish from there. Yea they are expensive, and their store is not that big...but they are very helpful and I feel a lot better spending money supporting these folks then the folks that run some of the other fishstores in OC.
On a side note there is this fishstore that I used to go to called "the zoo" in Aliso Viejo and they used to have the most awesome cardinals I had ever seen. They would actually throw the hundreds they got into a tank with a young arrowana to cull the sickly ones. I haven't been there for a couple years and don't know what they are like now.