Instruct: Classify Amazon reviews into positive or negative sentiment
Query: K&H Kitty Sill Deluxe Bolster Cat Bed

I purchased this item from Amazon after reviewing it on several sites. The perch is too unsteady if attached by the velcrose strip method. I attached it to the window sill by the three wood screws that were included wit the kit. It is a superb product and my two cats love it. They are 10 lbs each but only one cat sits on the perch at a time. For anyone looking for a window perch this is a good investment. Amazon sold it cheaper than any other site.