I absolutely don't need it, but I've got it. It doesn't play to my strengths as a shooter and I don't think I play to it's either. But it's such a great camera, I'm really glad I have it anyway. On this Italian trip it's getting far less use than either the Coolpix A or the XE1 with the 14mm, mostly because its not a focal length I particularly love. But some of the shots I've gotten with it I just don't think I could have done as well with anything else, whether for maintaining subtle tonality in low light or pulling back detail out of some king hell shadows and highlights. And once in a great while I even do something I sort of like with its narrow DOF that I sort of like. While its not my favorite focal length, when I do manage to nail a composition I really like, the images are just sooooo good.
It's occurred to me that the rational thing to do would be to sell it and get an X100s or something else that would get me 90% of the way there for less than half the cost. But it's really nice knowing you've got one "no compromises" piece of kit in the bag, and the RX1 is very clearly that. It's also so well out together and so smooth in operation, that its just something that would be hard to get rid of. I don't use it enough, but when I do, I basically like everything about it. If they'd just do one in 28mm...
-Ray