better than anything i've tried.
vnc, single-click uvnc, moodus, crossloops, logmein, pcanywhere, ms remote help, and a bunch of other paid-for remote desktop companies
it's a single exe on their front page, no installation: just run it. and there's no login and password that you need to get the user to understand or manage.
when they run the program they get an ID and password generated automatically for front of them. numbers only. you just have them read it out to you and you're in.
the ID is constant for a single pc, but the password change every time they restart the app for more security. they can delete the exe once you're done,it leaves no trace. and it's small enough that you can have them redownload it every time, which is often easier anyway.
my customer base is farmers, OLD farmers. i have not had ONE issue getting them to log on.
they're not always literate, much less computer literate. but they know numbers (got to count and weight those chickens you know...)
all other systems have been a nightmare.