I don't like him one bit. He is as condescending as the Thalmor, if not more. He may be a Telvanni Wizard-Lord and who knows how old, but he should at least have some form of manners. As soon as I was done with him, I made him unessential and this is how he sits in his little wooden tree-house now.
http://i.imgur.com/PrYHhjD.jpg
Of course Talvas didn't much appreciate the new state of Neloth, so he also ended up in the same state, although with all his limbs still attached.
This was a bit troublesome, tough, because now I have to polish my Daedric Battleaxe yet again. That Maven woman sure had some thick blood.