I own it since it became available. I like the little features like the opening of the lenshood to be able to turn a polarizer - I just don't see me using a polarizer in this kind of lens
Since I don't own any Pro-body (X-T1 or 2, X-Pro or X-Pro2) I only can say that on an X-E2 action-shots are close to impossible, at least pretty difficult to get. The focus limiter is for a weird distance (instead of 5 m - ∞ I'd prefer 1.6 - 3 m and maybe also this original setting) and I constantly think, even with switched off OIS, the lens is consuming battery power while doing nothing due to it's electrical operated aperture. Which I don't like better than focus by wire. Nearly two full turns of the focus ring to come from 1.6 m - ∞? Come on...
I expect to experience it's full potential on a X-T2, so far I could not benefit much of it, but I suspect the limits in the comparatively cheap X-E2.
And the 1.4× teleconverter is nothing to rave about. Fuji offers it for little extra money as a package with 50-140/2.8, but it's definitely not worth the recommended price tag when sold alone.
About the tripod base we already discussed. Since it's not Arca-compatible plate, I had to mount one anyway which is now very stable. As far as I can say, the whole unit - lens, collar, extra plate - is more stable than some of Nikon's combinations with the RT-1 (accessory collar, sold for app. 200$)