We have been a fan since we bought the single platform. I personally found them easy to place on window. This window also has a tint film and it attached with no problem. A good cleaning of window I used Windex with Ammonia , no bends or wrinkles in the suction cups clean with rubbing alcohol. Then place them where you want I found they fit 3 different sized windows. My cats weigh 10 lbs. & 12 lbs. They love this perch in the window. If you have a problem then call the company good experience with customer service and fast delivery of replacement part.