Yep

We tried it for a few months, then all of a sudden we can no longer access it and password reset does not work.
Lots of promises that never got done. Always next update or next week or soon, but never done. Support is really iffy at best.
This app had potential, but too bad the creators didn't have the drive or interest in it.

I'm also a little big disappointed in Appsumo, for not making companies like these pay back when they only play nice until the expiration date, then they disappear.
I'll definitely be a bit more skeptical from now on, which means less purchases for sure.