a) gotomypc is fast, very fast compared to live mesh remote desktop. With live mesh i have to sit there waiting for blocks of the screen to draw, with gotomypc its just there and smooth, you can even play a game over it that uses 3d acceleration.
b) file transfer without making some mesh folder. I would like to transfer a directory like i can in gotomypc or a ftp client, 1 time only while in session.
c) don't log out the desktop after connection or at least make it an option not to. Sometimes I use the remoting to control my desktop or laptop from eachother just feet apart. Its annoying to have to relog in after a session.