Product review (4 stars): Glad I got the extra length vent hose
I'm glad I got the extra long vent hose.  I needed every single inch to get it to go out of my basement laundry room.
The external foil seems a little weak, so be careful when yanking on it or clamping it.  It can be easily crushed if you slide the dryer back to the wall.  But it does what it's supposed to,