I am doing a trial for Insight and while it seems like a great idea, I'm not sure what it is even measuring the performance of. Ping times? Load times? It currently doesn't seem possible to do anything further than putting in a website address. I'd love to be able to have it go to a website and log in and measure the time to get to the next screen.
I think this is a great idea and my company demo'd some solutions that do something similar. Having it built right into the MX firewalls we have deployed would make things much easier.