Product review (4 stars): Safer and better
I bought this for its UL fire rating.
Out of the box the duct was about 15 inches long (fully compacted).
The instruction booklet, which was packaged inside of the duct, said it can work with standard fittings if you twist off the connectors. I did this, very carefully.
The outside dryer vent here is straight behind the dryer's exhaust, so I had to either cut the duct shorter to fit in the space, or have the dryer further out from the wall. I cut the duct.
I tried reusing the spring tension clamps from the old "foil" duct. Not a good match. It really needs "worm drive" or similar clamps for use on standard fittings.

Update:
Since this was installed, the gas dryer here seems to take a little less time (the duct's manufacturer claims better exhaust flow than "foil" ducts due to design differences).
I have done two loads of laundry since it was installed. One medium-size and one large. Each took about 10 minutes less to dry than usual.