Hi, from personal experience, our 2-man team found TeamViewer a bit more useful though.

Twiddla has its strengths but it failed when we tried to share a dynamic website. It only excelled in sharing static websites so we were unable to share websites that required a log-in or a form submission. We ran in to a lot of time consuming problems when using Twiddla so we abandoned it because we just did'nt have the time to play around. I guess it is more for communicating with remote designers and it definatly is way better than MS Paint.