I love Mikogo. My business is mostly virtual. Since I started using it my clients are thrilled that they can review their tax returns, seeing what I see, instead of just over the phone. I've also conducted financial meetings and walked clients through proposals. There are too many great infographics these days to miss out on your client seeing what you want to show them. But my favorite thing is that it's so easy! My clients don't have to install anything, just press "Run" and we're good to go.
I also do VOIP conference calls with colleagues. We can look at various people's screens so that's very helpful. My business couldn't live without Mikogo!