Similarly bought a 25ft and got a 18ft for free, like any GF or CF poles, expect them to wear over a reasonably short period of time. If you get 6 months out of them then that's not bad.
We got the 2 poles for about £200, together they should last about a year, works out at less than £5/week.
They are light, easy to use and have decent Vikan heads on (we got 10" sill brushes)