I've been able to make apps with Tropo really quickly, and it's been invaluable to my team and I as we tackle difficult hackathons, client projects and our main software project, Geoloqi. It integrates well with everything out there, and the support is incredibly strong.
The Tropo IRC channel is always available with more than a few Tropo representatives there. There have been multiple occasions where our requests have resulted in immediate action and changes to Tropo.
They've make awesome power available to their users, and they're really making strides into increased documentation and usability every day. It's fun to watch them evolve.
