No, I don't climb, although I have tried it before and want to try it again. But yes, I have been up in trees either free climbing or with a ladder. And no, I don't recommend it, I said that earlier and I'll say it again. I mainly use my "climbing" saw for brushing, limbing a downed tree, trimming, etc. Do I know how to use it properly? Yes. Could I get hurt with it? Yes, it's a risk we all take. I find most of my "close calls" happen when I'm tired after a long day or in a rush. If I come across a tree that there's just no way I can handle, I call my climbing friends.
So is the 019 lighter and better balanced? What length of bar do you run? I find 14" is right for me.