I'd also enjoy true multi-device support, but I've been using Hangouts for a long, long time (when it was still Google Talk, and before the Android video/voice

I'd also enjoy true multi-device support, but I've been using Hangouts for a long, long time (when it was still Google Talk, and before the Android video/voice capabilities), and it's never been very good at IM, where Whatsapp is very reliable on the contrary.