In general, the impression is positive! You can really do other things while he cleans the windows! And I have a little more than 20 of them in a three-story house! Washing them by hand 2 times a year is not realistic! And I did not expect that he will cope with his task with a bang! Washes great! Even one time! And if you also go through the second one .! In general, the purchase is satisfied! Yes, and great support! Issue resolved promptly.