Theclaytons: Sounds encouraging. Any idea when we can expect 1.2.7?
I'm not involved with the development at all - just snooping around in GitHub. There have been a few merges in the past few days. If you sign in you may be able to get a CI build APK - not something I've tried.
The WiFi calling itself is quite good. I've had it going the whole day. There's a seamless handover between VoLTE and VoWiFi. Last time I tried it was prior to the VoLTE rollout (different phone) and the call would drop. I'd expect lower battery use from the more efficient WiFi radio too, so I'm keen to use it in preference to cell where possible
Reception at my place is a bit spotty in a couple of rooms - one of them is my office. Wifi and cell reception are both weak in my garage so I forced a call drop there. The phone wouldn't let me place another call for a couple of minutes after the drop. No issues otherwise. Skinny seems a bit more robust jumping between two weak networks (couldn't force a call drop), but there's every chance the cell sites used are different.