Yes, I have used other free programs similar to this. I was looking at more for commercial support. If I can walk a user through installing the piece needed on their end would make it pretty simple.
When I mentioned Logmein, I use it on my parents machine. I installed it under my account as one of the machines I connect too. Makes it pretty easy when they are having a problem for me to just pop in and fix it.
I also use it to connect to my desktop at home when I am at work. And I set it up to access my work desktop from home if I decide I want to take a day off.