I was thinking about buying the 23 f1.4 for my Fujifilm system but then again I have the X100S which takes fantastic images and covers the same focal length except the lens is f2 rather than f1.4. I decided to get the 27mm instead because I needed something small with a little more focal length to it. It certainly isn't expensive (another plus) and it's very small and light. You can (almost) put the X-E2 with the 27mm mounted in your pocket. Very nice combination.

It's not the sharpest lens in my arsenal but the images sharpen up nicely and monochrome conversion is still great (not that the lens would have any effect on this). It gives you a rather strange 35mm equivalent focal length of 41mm which some people find it's not one or the other. Not wide enough or not long enough. I personally feel better with the 40mm FL than the 35mm FL. But that's just me because I see things rather longish. I much prefer using a longer FL lens than a wide one.

All in all, a very good investment to my X system and a lens I'll be using quite a bit.