I bought an 090 about 5 years ago more just to have one than anything but ended up using it now and then. First of all its huge, I think the powerhead weighs about 35 pounds. Secondly it does have a much lower rpm and is loud
as hell. Also I think there is an anti-vibe type handle for it but I'm not sure where to get one, mine doesn't have one and it'll just about rattle your teeth out your head.
I'd say its strong point is it looks awesome and its just about impossible to stop it when its wide open with a sharp chain! If you do use it, make sure you've got some good earplugs/muffs and enough size to handle it.