This is the first 85mm lens that I have owned. Previously I used the EF 50 f1.8 on my APSC cameras for this focal length, which I used a lot for portraits, so I was looking for a suitable alternative for FF.
The STM motor is a little slow & noisy when shooting stills (quiet when used for video) and can hunt sometimes in low light, but despite that this is a very nice portrait lens at a much cheaper price point than the RF85 f1.2 with the added bonus of close focusing & semi-macro capability. I use this extensively for portraits, where the focusing speed is not an issue and have been very pleased with the results. Is it worth upgrading from the EF 85 f1.8, probably not, but definetly worth considering if you you want a good native RF portrait lens at a reasonable price.
Small, light & cheap, with surprisingly good image quality, the RF 16 f2.8 is an ideal lens for someone starting out with wide-angle.
The small size is off-set by needing heavy corrections in the corners, but the resulting image quality is still very good for a lens of this type & price.
Its size means its a lens that you can throw in your bag or jacket pocket and bring anywhere.
For the casual shooter who doesn't do a lot of wide angle, but wants the abilty to when needed, this is a very good option.
If ultimate image quality is your objective, then there are better option, albeit, much larger, heavier & more expensive.