I'm a fan of the store, no matter how many Seans are there, but I had bad luck with the Yashia\Pistol combo I bought. The Shrimp never came out, no matter how hard I tried to feed it, and I found it dead, lasted about two weeks.
The yashia was incredible, and made my wife decide she liked the whole fish thing, even doing the daily feedings in the nano where it was. It would stick its head out of a small rock cave it made, and chase down pellets or mysis when dropped in.
Sadly, it disappeared and I found it a few days later behind the tank stand. Somehow it had jumped through egg crate and onto the floor to some kind of death. At least I know I don't have mice in the basement I guess. He\she is on the right, in her cave.
If you haven't seen them in a few days, and food doesn't lure them out, I would shake up the aquascaping, to make sure it is moving around and OK. I paid $50 for one month's rent on that combo.
jp