I have about 7 years logged in with 2 managers. I more or less built my hvac system around them, dampers, ifttt, ecobee, flair etc. When they go down, and I know it happens everywhere, my house can get stuck in heat or cool mode... I'm not a proficient coder, so it's hard for me to put fail-safes in place to prevent it. I love the product, obviously, but feel like I've painted myself into a corner. Is Zhiheng a one man shop? I hope he's ok and that nothing has befallen him... but the lack of communication is also a real tough aspect of this.