> Also, I (selfishly, perhaps) have more faith in the reliability of an established service than something recently launched. This was my thought as well. I've

> Also, I (selfishly, perhaps) have more faith in the reliability of an established service than something recently launched. This was my thought as well. I've had a number of projects where I had to deliver large numbers of emails and SMS and the problem has never been the design of the API I used to send them. It's always about the delivery rates of those messages. Particularly with SMS we've had to be very careful with our providers, often needing to select a different one in different countries.