It's easy, fast, reliable and effective! I've been using it since 2014 when we started working on our website (we're an ISP) and now - in 2018 - I still can't imagine my life without this tool. Sometimes you need just few minutes or hours to get everything back up and running but that doesn't matter much because after that you have peace of mind knowing your server will be always online no matter what happens. As far as I know there isn't anything bad about them so if you want to try out their services definitely give it a shot. We use it daily to monitor all 3 servers hosted at Hostgator.