It is light, sharp and delivers brilliant results.
If you are looking for one prime lens, this has to be it! The Sony engineers behind this have created something special here. It is light. Attached to my A7III the combo comes in at a kilo. Less than half the weight of my previous Sony with Zeiss 24-70.
It is sharp. There is a range of comparison videos out there that compare this to the Batis 25. I can't answer those differences here. I chose this having seen all of them on it's low light capability (Excellent at 1.4) along with the breakthroughs in eradicating sagittal flare (it does really well) and chroma (which I've yet to notice).
I've answered yes to the 'is it good value' box. Remember, Canikon options on the same cost 50% more and are (debatably) not as good. If you have the A7R3 don't worry. This baby can resolve images of the largest size comfortably.
It is light, sharp and delivers brilliant results.