I know I'm a bit late with the review, but only recently found time to set this up on my site and I love it. I had a few worries originally as I felt many of the popups didn't quite highlight the correct part of the page (off by a few cm) but the support team took a look and updated it last night and now it looks fantastic.

I've been worried about the onboarding process on my site as most of my users aren't the customer (their boss buys the subscription and gets all staff to create accounts) so they may not understand my product when they first log in. UserGuiding means that everyone gets an interactive tour. I love it!