I used to read on comic fury, and I miss having the "save my place" button. Taptastic has a "continue reading" button, but I occasionally hit the x by accident. I feel like the other website's button was more fail-proof. Really, that's my only con. I also wish that people censored more, and put the NSFW warning on all pages with cuss words. I'd be able to enjoy more comics if I could skip pages with language. (I'm not allowed to read comics with cuss words, and even if I was, I still wouldn't read them.) But, I still have found some great, family-friendly comics, with no profanity (that I know of.).
A really great pro is that so many of the comics look professional, which means more good reads for viewers. (But, more competition, too. )
Hope this helps! 