The first big problem is lack of Windows Phone support, they claim to have “Native app for all platforms” but that’s kind of a misdirect.
The Windows client is very simple but is missing a few things that would be nice, like being able to minimize to the tray instead of the taskbar. Or even an option to not automatically start.
The app itself seems fine, though I have to admit the lack of group messaging is a little strange.
Looking at the support forums there seems to be some question on when Bleep is really P2P and when it uses a relay server.
Overall I think it’s still only half done, but I guess getting something out in the open was better than leaving it as a closed beta.
For now, I’m not using it and will likely uninstall it, perhaps version 2.0 will be better.