[mgkimsal]

Initially pricing, and the 'only pay a little up front' aspect - no monthly contracts. I just charge up the account now and then. It used to be $1/1000 - dropped in Jan to half that (yay).

The setup wasn't too hard, and ntoper and a couple others were in IRC to ask questions of (and they provided some more support via email as well). I was a transition customer - started about a year ago when they were putting the polishing touches on their public offering. What I had was rather beta - no self-serve payments, reporting didn't work too well - but it's improved a lot in the last year (and even a year ago it worked for what I needed).

edit: the support was primarily me setting up domain keys and such on my end with DNS entries - the instructions weren't as clear to a non-sysadmin mortal such as myself a year ago.

So, pricing, pay as you go, IRC support and friendly people. Does that help?

[noahkagan]

Interesting. I've liked Sendgrid since when we've had issues of peoples email going to spam folder they are pretty helpful in tracking down why. (mostly saying gmail is a black whole (: )

[mgkimsal]

I hadn't learned of sendgrid prior to going with critsend. That said, critsend has been fine with supporting my few issues, and until they let me down I'll keep trusting them :)