Your in for a treat then because the universal is awfull,the clamps on them are the worst I have ever used and they are very heavy.
I have been useing a 17' xtell for a month now and Its superb.The clamps are super fast with a lot of adjustment in the screws and the pole glides up and down.Its a lot shorter when compact so you can use it downstairs far easier then your 18' universal. My hourly rate has improved again as I allways used a minipole along with my 18' pole.
The xtel is more whippy but its very light 1.4kg.Just make sure you put a lightweight brush on it. Go to gardinerpolesystems and you can buy it with the superlight brush deliverd for £101.00 incl vat, A Steal at that price.
I also like the extender 18' pole, lighter again then a universal and the same weight as the 17' xtel and when you have a superlight brush on its very rigid, a lot more rigid then the xtel but you nee a to use a mini pole for downstairs. the shaping of the extender means the pole will not twist round when clamps are lose.It does not slide as well as an xtel pole does when adjusting,
You seam to get more grit in the clamps on an xtel so you have to wash the pole out a bit more often.
Neil