Green German made Unger poles are subject to corrosion from daily use, I’ve returned a 4 day use Optilock 12’ due to corrosion on the alluminum and that bad boy cost me 76.00 USD with tax. My 8’ Sorbo California Dream pole never ever did that in the 4 years i’ve owned it, and that one was also about 70 USD, aside from other negative squibs on the Sorbo, I feel it is a better pole and made for window cleaning in its practical use and has less flex than the Ettore.
The flex on the Unger is ok, still prefer the Xero Micro but that is apples to oranges.
Ettore are good value for the use you get out of them. Only problems I’ve had with my Ettore 8’ was the collars seizing on the aluminum, but never any corrosion, unlike the Unger Optilock.The Ettore flex is substantial in use, and at times greater, keep that in mind, but cost substanially less than either the Unger or the Sorbo.