Product review (4 stars): good
Pros:
- does not leak.  I find the regular semi-rigid hose being never fully hermetical even to start with, so you always have some leaks behind the dryer causing dust accumulation and blocking of the dryer's intake.
- flexible. With claimed length of 8 feet it comes as an "accordion" only 4 inches long! It has some spring-loaded action. I can slide the dryer out by 3 feet, attach the hose and slide the dryer back without any problems.
-The hose is reinforced with reasonably sturdy inner metal coil and does not collapse when pinched.

Cons:
-Clamps. Buy separate clamps like these
&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Whirlpool-4396008RP-Vent-Clamps-2-Pack/dp/B001AAEG68/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Whirlpool 4396008RP Vent Clamps 2 Pack</a>
 since those that come with the hose do not always work ( I was able to use only one of the clamps , the second would not fit the drier's exhaust ).
- Material is rather thin and you have no feeling when it can break.  In other words: I did not break it, but was constantly afraid that it might happen especially when I was forcing on one of those clamps. I even cut off peace of the hose and tried to tear the wall.  It was not difficult. Once it starts - it goes. So watch for those nails.