I was surprised how often I encountered gotoMeeting over the last few years. I did not really like the software: The user interface is horrible, it is not available on Linux (which I am using), and the Android app seems unstable.

Yesterday I used TeamViewer for the first time, I was pleasantly surprised: It worked very well, had a great user interface and is available on Linux. I am prepared to pay the $500 is costs on the spot, if it turns out that I will need it on a regular basis.