Very nice looking but I still don't understand manufacture's decision to make devices with non-removable batteries.
I've never carried a replacement battery. It's not something I have any interest in doing. I like to get a full day, but I'll plug into a nearby charger before replacing a battery. My suspicion is most people feel the same.
However, I have had my battery fall out a few times because the battery doors aren't always perfect. And that's a nuisance.
My only beef with the non-removeable battery is doing a hard reset, which maybe I wouldn't need to do on my Rezound if I wasn't running a rom but I have had to do it.