In my uneducated opinion I think it’s a great lens. I say “uneducated” because I really don’t do tech talk. People discuss pictures and lenses here and use terms like barrel distortion, fringing, smearing, fall off, and all sorts of other terms that just make my eyes glaze over from a lack of understanding. I just make pictures and look at the results; I either like it or I don’t based on the overall visual effect. Often if I don’t like what I see I assume I’m the problem not the lens.
Having said all that, with this particular lens my biggest challenge is composition. When I shoot with lenses in the 35/50/75mm range I’m pretty comfortable with composing and making photographs that please me (maybe nobody else) and I can feel free to share with others. However, with a wide angle lens like the Fujinon XF 16mm f2.8 R WR lens it gets a little more complicated for me, especially when shooting street photography. For me it’s so important to get the main subject up-close, distortion free and in perfect focus. Then, it’s all about the background. There’s so much background and if it’s not interesting the whole picture falls flat. Putting a good composition together for a wide angle shot is a bit more tricky and requires much more effort (in my opinion).