Firstly, I would like to say I'm coming from the n950 port v2.3. I dirty flashed over that, and yup, force close galore, so to anyone who might be coming from that, don't dirty flash. I knew it would happen, but had to try. So ultimately went with a full wipe and new flash.
So far has been very fast and extremely stable. Not a single issue for far IMO. I will add however, it does not seem to have that 1% extra responsiveness of the note8 port rom, as well as the dual app buttons. But I feel more confident and secure with this rom as it is an official S8 rom. And on a positive note, scrolling, in general, is more consistent. Like with the note8 port, it would scroll smoothly, then a micro stutter then smooth scrolling then micro stutter, such as on webpages, instagram, etc. This rom the scolling is basically just as smooth but does not have any micro stutters. Also i feel like website performance on the stock browser is very good and extremely stable. Pretty much on par with my iPhone 7 plus.