Great lens. A hidden gem. Yes, it is big and heavy, but you won't care once you see the quality of the images. I use this on the A7RIV with its 60+ MP and I am amazed at the level of detail. It allows you to take full advantage of the sensor's resolution. Super sharp. Great micro contrast. Fast and accurate autofocus. And at the current used prices, one of the best bargains out there.
Extremely sharp across the frame
Excellent contrast
Fast, quiet autofocus
Excellent chromatic aberration control
Low distortion
Fairly good flare control for a wide aperture prime
Nice bokeh