Product review (4 stars): Worked great in a tight location
I recently bought a new washer & dryer for my refinished basement and realized that the space between the dryer vent and the wall was real tight. Thankfully I found this. It allowed me to fit my dryer without having to remove the doors to the spot it was to be in.

The only thing I wished I had done was to trim the excess away before moving the appliances in. I only needed an inch, so I had about 8 inches of the periscope on either side of the vents which abstracted the space where the washer was going. As I was doing this myself, it would have been difficult to move everything back out, so it got a little twisted / bent when I slid the washer in. No worries, it still works fine.