I've had this lens for a couple of years, attached to the Rollei camera. At that time, money was not an issue.
Anyway, I've always been very pleased with the performance of this lens. Very sharp, nice color rendition and very well made.
One thing you'll notice is that it's significantly heavier than you would expect. I expect that it's because of the use of brass within the mount. By the way, it's a LTM lens that comes with an M-mount adapter.
The lens uses a tab to focus, and in use the helical is very smooth -- much smoother than other lenses you may have used. There is a built-in lens shade, which is so tiny that I wonder if it's actually useful. Quality of construction is excellent.
The camera itself is a true Bessa-R2 clone with different markings, color scheme and body covering. The viewfinder, as you might expect, is very good although with a narrow base. rangefinder.