Product review (4 stars): On the dryer and working great!
First off, I must say that the duct is almost exactly the same size as the ports it's meant to go over. The fit is very snug and it can take a bit of work to get the duct connected to the dryer. Same thing with the clamps.

My suggestion is to put the clamp onto the port first, then connect the duct, then move the clamp over the duct to hold it in place.

Once all was said and done, I started the dryer and checked the duct for any punctures and there weren't any. Everything was just fine!