Product review (5 stars): Worked great for us!
We have a long run (about 21 across not including the short run from the dryer to the bend into the main run). We bought 2 kits for 24 total & duct taped the pieces together to be sure they wouldnt come apart. We used the drill to send it through, CLOCKWISE ONLY, passing it up and down a couple times for each area before proceeding to the next section.  Once it came out the other end, we pulled the whole thing out from the outside vent.  Price was right & we know it was fully done correctly.