Default RMA Nexus 5

Hey guys, I'm thinking about RMA my nexus 5 because my power button is loose (we all know this problem) it doesn't bother me that much, but if I can have a new one that works fine why not, right?

So my question is, how do theses things usually go? Do I get to keep my current nexus until the new one arrives? Have you guys RMA about this problem and was it worth it?

Anyway, thanks for your attention.