Well, i took the plunge and i am currently flying across the Atlantic, from Heathrow to JFK and a combination of Navigraph Charts (Beta) and Simlink are allowing me to watch my progress all the way. I am not currently using it inside the cockpit for a couple of reasons. Firstly, imported windows currently appear to take up almost the whole of the XP11 window, making mouse control somewhat challlenging and secondly, if i was currently sat inside the cockpit, watching my progress, i wouldn't be typing this now, would i?
If you have a Navigraph subscription, i would highly recommend trying out the charts and simlink combination, as not only does it show your route, but it makes the charts for the destination airport, including radio frequencies, very easily available.
I am due to land in about 3 hours time and have pause at T/D set just in case i nod off in the meantime. It really is a good job that i am not a real pilot.
Edit: Oh and the FF 777-300 that i am flying, in BA livery is pretty cool too.