Browsing is actually acceptable in speed, but as mentioned above many sites simple won't load.
Snap staff are publicly claiming on forums that everything is peachy but if you ring support they will tell you that there are issues and they're working on it.
I have only been a Snap customer for a few days. Prior to this weekend my speeds were ok, not great. I wanted to take advantage this free weekend to fill out some of my Steam catalog but that's not going to happen.
My experience as a Snap customer so far has been overwhelmingly negative. I DO NOT RECOMMEND THIS ISP.