Ok, I'll be the first one to say it.
I have used the chainsaw attachment for a couple of years now to embellish my turnings, without the slightest problem. I'ts no more dangerous in my opinion than a normal grinder cutting disc which I used at work as a maintenance fitter.
I would'nt try to cut a tree down with it, but the one I have is well made and a good fit, including guards.
The problem with a lot of power tool accidents is mis use by the owner.
This is my opinion only.