"JUST THE JOB!"
To think I was almost put off by some of the reviews! I bought this for windows on the inside, plus my large mirrors. On the day it arrived, I did all my windows, including the outside of ground floor only (house too tall to attempt upper floors). Once I worked out that you turn the INNER pole to fix the length, I found it strong and stable. I have waited for a rare sunny day to report that the device and the Nilglass have done an efficient, smear-free job. No more wobbling on stools and ladders ...