I have one of those I have yet to mount on a tractor. Mine is the sleeve hitch version. I contemplated converting it to use it on my Ariens 3PH. I have a sleeve hitch adapter, but it will push the bucket out farther than I like for leverage/center of gravity reasons. Mine has the scarifier teeth on the bottom of the back side of the blade. I think it has the bolt-on teeth for the front of the bucket as well.
As far as favorite attachment...I would have to go with the Ariens GT Bagger-Vac in the fall. It makes leaf collection so much easier. I have a lot of leaves, so I'm a little biased to that attachment! =)
I live way out in the country where we just let the wind blow the leaves off the yard whenever it happens.