Product review (5 stars): Worth it at twice the price
This thing saved a service call and probably a dryer-replacement. Read the reviews and read the instructions to make sure you use it correctly.

We rent out a townhouse and when the tenant said that the 10-year old dryer was taking a long time to dry we had a decision to make. Do we call for service and pay a hundred bucks for who knows what opinion? Or do we just buy a new dryer and make payments as the cost of maintaining a rental? Those were the options until I found this product which provided a third option - clean the vent! We didn't even pull very much stuff out - like maybe 12 cubic inches - but it solved the problem. .