> We did a head to-head with twilio and tropo and twilio won hands down in terms of actual "production-worthiness" despite tropo having "more" features including speech reco.

Had the same head-to-head, and Tropo won for us. Tropo has substandard docs and higher prices, but the tech and API is top notch. We also needed the international coverage. Regardless, they are both great products and great companies. You can't go wrong with either, unless you have very particular needs.