Have to say, I'm new to wechat. Loaded it before coming to UK on a work trip, and also on my wife's phone. Although we Skype everyday, I love that my daughter leaves me a wechat message telling me what she's up to! It somehow is 'more special'...
however, other than a way to send free texts (which are really cheap anyway), I don't really see it as a day to day tool.
tb