SaaSy is a service from FastSpring, just to clarify. To see what people say about FastSpring, try searching online or you can view what they're saying here:
http://www.fastspring.com/clients.php
Some samples: "I'm going to come out and say it: FastSpring is awesome. I haven't experienced customer service this good in my life. Every query I've had, from stupid questions to difficult questions to bug reports has been dealt with brilliantly." - Daniel Kennett, kennetnet
“FastSpring is definitely the best company I have ever interacted with (note: the best company ever, not just related to e-commerce).” - Ruman Stankov, Triland Inc.