I have a couple of these receivers, and what he is saying is correct, they are re-badges Futaba's and come with the crystal. Never had a problem with them. FMA direct also has compatible receivers.
ORIGINAL: piper_chuck
I've got a couple Electron 6 receivers, they work great and they're nice and small. Unfortunately, this is one of those items where Tower is rarely the low priced vendor. I looked at the Supreme 7 receivers, but the picture and decsription say the slots are not there for the alignment pins on Futaba style plugs. I've got lots of Futaba servos and I happen to think the alignment pins are a good idea, so I'm staying away from this receiver. Another receiver to watch is the Tower System 3000 7 channel. Reports are it is a Futaba R127DF with a different label. It's normally $60, but occasionally they put it on sale for $55, or even below $50. Oh, and Tower's receiver includes a crystal.