I went ice diving in Norway 2 years ago and use an o3 suit...I had 2 layers of there PBB on and that kept me warm and dry.
First dive I did, I also had a 4th element arctic on as well...I was the only person sweating that day!
Hands werent so bad, just used 3mm scubapro gloves and they were fine.
Once you get past the initial shock of the temperature its not that bad.