Excellent. Helps you sleep at night knowing all your websites are working FAST!
Pros
This is another service that takes the headaches out of running many websites and making sure they are always working. The emails we receive show if there any issues with site speed. It's nice to know that when you've installed new plugins or changed code that everything is still working fast.

Great at tracking site loading speed.
Pros
Great at showing me daily updates on my page loading speed. I can easily see if an update may have caused some extra loading and quickly fix it! The weekly emails are awesome at giving me a quick recap of the week.