I've had Republic Wireless for several years. I had the Moto X 2013 and, now, the X 2014 (both on Republic).
I can say that it's really a mixed bag with them and comes down to whether Sprint service is passable where you live, work and play and if you need cellular data...
With all the hot deals on prepaid service right now, there's really no reason to get locked down with dodgy Republic/Sprint service on a 100% forever locked phone just to pay $60 (Republic charges hella tax and fees unlike every other prepaid service! Don't let their "$5, 10, $25, $40" prices fool you. You're going to get shafted with taxes and fees on top of that!)
For example, you could do StraightTalk or H2O Wireless or AirVoice or Cricket, etc. and not get f*cked for taxes and fees, pick whatever phone you want and never be locked to any carrier like you would with Republic.
So honestly, unless you only want the $10 + tax/fees plan, Republic on sh*tty Sprint network simply isn't worth most people's time or money. Go to another prepaid carrier.
Note: I'm only with Republic because of their $10 plan. If I ever find that I seriously need cellular data on a regular basis, that's the moment I bail on Republic, sell this locked Moto X 2014 and go with another prepaid carrier.