I signed up for the service, purchased the $50, 5,000 contact package, and uploaded about 3,500 contacts that signed up for my email list after checking out on my website. Immediately, my account was restricted for possibly including email addresses that did not voluntarily sign up to be on my list. There was no indication that such a check would take place before purchase. Confused, I decided to play around with the email creation software. The interface was clunky, slow, unresponsive, and unimpressive. It took me about an hour to create a basic email blast.
Anyway, I figured that I can't send my email so I may as well try another service. I signed up for another service and had an email sent to my customers within 30 minutes of sign up.
Stay away. Terrible service. Colin, you really are a jerk and I hope my prorated $23 only keeps you and your company afloat for a short while - I'm sure you'll both end up on the scrap heap before too long.
The customer support is very reachable, but beware - if you sign up for the service you will not get your money back no matter what - even if it is found that your email list is "invalid" (according to their checks, not according to reality).