I just purchased the HG-XE1 Hand Grip for my X-E1 on a spur of the moment buy. I'm really liking it more and more and am pleased I got it now
It adds a bit more height to the X-E1 body but more importantly adds better ergonomics to hold the camera body. I do find it's easier to hold the camera body and can now wrap the outermost 2 fingers around the extended rubberised grip area on the front of the camera body.
At it's base, it has a rubberised base inset too. The grip screws into the tripod screw-hole on the camera body and in turn, the grip itself has a tripod screw-hole in it's base too.
It's manufacturing quality is so good, the "join" to the body at the base is almost negligible.
Here's a picture of the grip