RE: 2.4 GHz... Will one transmitter work with other brand recievers?
Paying retail prices for Spektrum receivers is like paying list price for a car. Sure, some people do it, but most people avoid it. AR6110Es are under $40, and AR500s are around $50.
I can't imagine using that radio you linked to. It could be that it's just fine, but I've purchased no-name, bargain electronics before. They're uniformly crap. For some purposes, crap is just fine. For flying a model airplane? Nope. There are plenty of things in life that are great for being cheap on, but not something like a transmitter. There are too many risks involved, not just to your model but to the people and property around it. Not being able to change a setting without hauling a computer to the flying field seems shortsighted, too.