The best thing about proof cred is that it has allowed me to see which pages are being visited most frequently from my website. This allows me to focus on what content people want to read rather than having to guess as I do now. There's not much I dislike about proof cred but maybe adding some sort of notification when someone leaves could be useful for those who use their phone while they're browsing. It would let you know if any one had been there for longer than 15 seconds or so without interacting with anything. We have seen an uplift in sales immediately after implementing proof cred.