I'm looking for hosted monitoring solution (CPU, memory, disk, loads, mysql, replication network etc..) for a group of servers on Amazon EC2 /Scalr (app, mysql, load balancer).
So far I found http://scoutapp.com , http://www.serverdensity.com, http://portal.monitis.com/
Do you know the pros and cons for these services. do you have experience with them? Any other similar services I should look at?
Thanks!