Joining, will edit this post if the server is any good
EDIT:
So here's what I've seen. You start off with a fairly easy choice when you spawn. Factions of towny. So, I havn't played any towny before, so I just stuck with tried and true factions. Now, the signs mention one thing very clearly, YOUR CHOICE IS FINAL. Now, this is utterly redundant in my opinion. You could use these same hyper-simple command block choices in spawn to clear out your inventory and let you go to the other server, at the obvious expense. Well, whatever. Not a whole lot to do in spawn, it's mainly just the usual "Spawn this way" Teleporters we all know and love/tolerate. Now, the population on the server is fairly low, but that's not always necessarily a band thing, depends on your taste in playstyle. But yeah, The server switch system basically condemns you to being in one server or another, and the only option to be able to switch is to donate money, which isn't a very good incentive when you could just find a towny server in itself.