I got a Kindercoat a few months ago and noted similar problems as a lot of you mentioned - cheap-ish snaps and zippers, at the top of the list.
While I was going through each piece of the coat, two metal pieces fell out. My DH and I looked over each snap on the coat, and even though the pieces appeared to be parts of snaps, it seemed that my coat was intact. So hopefully it's all good.
I also was a little nervous about the black shell's durability. At first, the drawstrings were really stuck inside their tracks, and I had to mess with them a little bit before they would move enough to tighten. While I was doing that, I was a little afraid about tearing the shell.
The drawstrings dangling everywhere drive me a little nuts, but I saw someone else said they had shortened them, so maybe I'll try that too.
I haven't tried the coat while babywearing because I'm preggo and just haven't had to wear DS in a while. But I'm looking forward to wearing it this winter/spring w/the new baby.
So far, it's been a great pregnancy coat though.
M, mom to DS1 (8 yrs), DS2 (5 yrs), and DS3 (2 yrs).