Not for Me Thanks....
I'm not too fond of the hotels that i've stayed in who claim to offer a personal butler.
At the Burj in Dubai - the concept was especially strange - as whenever i had a request, it was dealt with by a different member of staff. Stayed there for 9 nights two months ago for a wedding and on the first day i requested my "butler" that a large bottle of room temperature Evian water be placed beside the bed upstairs every night. The first night & second night it was done by the initial butler, after that i never saw him again. Each night thereafter there was a different 'butler' stationed on my floor, and had to request the water every night.
You would think that at a hotel like the Burj could communicate simple requests such as this within their team.
Also dont you find that you tip a bit more than usual in places which have 'butler'?