I received the X-E1 today and my first impressions are quite mixed.
I love the form factor, feeling and handling of the camera. The size is perfect. A tad smaller than the Leica M3, but a lot lighter.
The EVF is going to take some getting used to, though after a few hours I've already adjusted quite a bit. It's not nearly as big as the Canon 5D Mark II VF that I'm so used to.
AF is not the greatest, but I'm doing alright with it.
I love the files! I'm shooting in RAW and editing with LR 4.4 and things are looking beautiful. I miss the extra 6 megapixels of the canon, but I don't print that big anyway.
I'll definitely be keeping the X-E1, and I look forward to the X-Pro2, whenever it domes out. I think I'm going to go for that as my second body and sell the Canon eventually.