We’ve used this for years, 100 lb gsd/husky mix with long legs fits just fine. Product could be air sealed a little better tho.

I was very impressed as to how well made this product is made. The springs are quite strong and you just need to loosen the screws a little and the sides pop out to fit the perfect width of your window. This cat door seems to do a better job that the doors with the felt that needs replacement, when it comes to sealing out the heat or cold air from outside. I needed a little more insulation than what was provided in the box but that is because my window required some modification to accommodate this product. I'm expecting this to last a long time.

Easy to install, fits securely. You may want to purchase an extra roll of adhesive foam caulking at your local hardware store, though. Fits dogs up to 90 lbs, but unless your window sill is flush with the floor, ramps on both sides are a big plus for both small and large pets. My 70 lb male has an extra wide head and tore his ear going thru the door. I’ll be adding some foam padding around it to prevent future issues.

It is just what we wanted. Our cat started using it right away. It is very sturdy and well made. No complaints.

Our new rescue dog (35 lbs.) loves his new pet door! Works well. Fits great. Waiting to see how it does this winter with letting in cold air.

This window insert is amazing, my dog uses it every day to access the patio while I’m at work. Measure your window (and your dog) throughly before picking a size. I haven’t had any issues with the product shaking or moving in the windowsill when my dog uses it, but it does need some added insulation at the top (it comes with a strip) if you want it to be flush with your window.

Very happy with this purchase. Now the cat can let himself out early in the morning without waking up my husband. I was worried he wouldn’t want to use it, but he started using it right away after we showed him how it works. And it looks fine. Not as nice as the regular window, but not cheap looking.

Love it, it is great. Gives them freedom to come in and out as they like. Only good if your pet is used to the area and knows to come back or stay in your yard. Always close it off at night, not safe for pets to stay out after dark or before daylight.