They are fantastic poles, there's been a lot of talk about them on this forum recently, I'm not sure how good the 40ft will be, but I've got a 25ft and 18ft and they are so light, rigid and fast to use its unbelievable, I have a 35ft slx2 and its so bendy it's really not easy to use, can hardly get decent pressure, but whether the phoenix will be any better at that height, I doubt it... It'll probably be wippy and bendy but that's just the norm with any carbon pole at that height. Unless you go for a gardiner xtreme pole...
Also the facelift brush is fantastic, amazing scrubbing power, and works so well on the glass, I may do a comparison video between gardiner and facelift brushes to show the difference...