We recently switched to optitune from labtech, and couldn't be happier. It has all the features we require, the support is wonderful, and the price is right too. I really like the remote assistance feature where customers can request assistance from the "support center" desktop app, and one of our techs can respond and help in real time (control their desktop).

For our severs, I like that I don't have to open firewall ports in order to get remote access, since the installed agent opens an outgoing connection for remote desktop to work, and it's all done through the optitune management website and their remote desktop software. In fact, its a bargain when you just compare it to team viewer, for example, but it also supports real MSP functions like deploying applications, scripts, monitoring, and viewing performance data.