- Our customers strongly prefer to call in via landline than to use their computer for audio. Make sure to send them the national call-in number (we've been talking to customers in Germany)

- Either only share a part of your screen or put your screen resolution way low. This will improve image quality/speed and makes sure the image will fit onto their screen, even if they use a small laptop

- Online-demo software that "just works" for the customer doesn't seem to exist.

-- Skype and Google Hangout need registration/installation, most others (including WebEx) need Java in the browser.

-- If you are lucky, the company uses one of these themselves. We've mostly not been lucky.

-- We also tried join.me but their screen updating algorithm is awful. It updates squares instead of the whole image, but in a seemingly random order. If you scroll down a page, it's just confusing chaos. Way worse than updating the whole image once.

I'm open for better suggestions...