Midway may have a better price on fish, but they have so small a selection that anytime I've been looking for something they didn't have it at the time. I have looked at some of their prices though, and for the fish I've noted they were just about the same price, certainly they were not lower by far. I was also discouraged when they were selling a blue hippo tang, I forget the exact price, but they listed it as a super large and a price of like 79.99 (not sure exactly, but it was high). The thing was maybe 5 inches long, I assumed the guy was mistaken and I tried to explain that they can get quite a bit bigger than that, but he wouldn't budge. They had a tiny one in the tank for cheaper.
Also, Midway tends to really pack their fish into just a few tanks, they have such a high percentage that are nicked up, it is unlikely I will buy from them. As for cleaning crew, Blue Sierra has a fairly decent package. I have never seen enough critters at Midway to make up a crew. They've had a few hermits, snails, and shrimp, but not in much qty or variety.
To be fair midway is a full pet store not just fish, like Blue Sierra, so I can understand the limited selection, but there is no excuse for their service.