[Zarel]

I'm Chinese and my relatives and friends use it, so I have.

I personally strongly dislike it because you have to set a phone as your primary device. And if you break your phone, all your message history is gone.

In theory it has a desktop client, but the desktop client sucks. It requires you to use your phone to scan a QR code (which is currently failing for me with an "Unable to find (3,-1)" error).

They only recently added the ability on the desktop client to save message history (before, it would be wiped every time you log in). Even now, I can't see messages received while my computer isn't connected to WeChat (e.g. when my computer is off).

In general, anything that makes me use a phone keyboard instead of a computer keyboard to talk to people is a no-go for me.

So yeah, I dislike it for reasons that have nothing to do with the privacy. It has "better" privacy than most apps since it doesn't do cloud message storage unless you tell it to, but I'd rather it did like Facebook or Hangouts or Skype.