Basic use case is great, everything else is bad

Basic use case is great - you get your voicemails and can hear them.
But if you want to set up groups , custom voicemail greetings for different phone numbers / numbers with wild cards, be prepared for the worst user interface you could possibly imagine. In the end, things will still not work.

Nickhhjhddhh about YouMail: Block Spam on iPhone, v4.1.20