Twilio is a fascinating company with a great API that is simple, yet powerful. Documentation is adequate and abundant. My only complaint, albeit minor, is the lack of feedback on the short code approval process. There are long periods of silence and no one will answer your emails when inquiring as to the status of the process. There may not be much information that transpires between Twilio and the Telcos, but that shouldn't stop the communication between Twilio and their customer.
