I wanted to use them. But they had a bug in SMS sending and it's been a few weeks (or more) and they have not fixed it or been able to fix it. Also, it was not clear whether they use the same setup for recovery/alert SMS (I asked, received no reply). I tried following up with their support for a few days (it's a one-person setup; recently a support person was hired who responds on Discord and is apparently swamped), but it didn't happen. I just tried now and the issue still exists. That seemed like not a good sign. Also - ownership has changed few months ago.