Ive been using Sync for 2h now and its just perfect. As already said I havent really used it a lot but until noa everything was great.
The only thing that I immediately saw and changed was teh font size. On default it was on "smaller" and I changed it to "normal" so I could also read the comment, because on smaller it was really small.
Also the price is totally ok on my perspective, you put in the work and make it even opptional so we can use it for free.
Overall the UI is glorious and for my preferences even better then reddits ones.