I bought a new place, and a brand new, state of the art washer and dryer from Lowes. I'd read about the dangers of cheap dryer vent hoses, so I bought a more expensive, all metal vent hose, but when the machines were delivered, Lowes had included the cheap flexible hose they usually install. When I protested, the installation guys (who were very nice guys) said it was what they always use, and they gave me a credit for the difference and installed the cheap hose, which was all they had on the truck. However, in less than a week I began getting a "flow sense error" message when I ran the dryer. I Googled that and learned it meant the dryer was not properly vented, so I Googled how to resolve that issue and found Dryer Vent Wizard. There were NO negative reviews, and after having Charles come out and troubleshoot the problem, I can see why. He was terrific! My dryer is not on an outside wall, which means the vent runs through my house, so he started by checking out the exterior vent. He told me the code has changed, which means if a new vent were installed today, it would be a slightly different one, but he also said there was no danger from the vent I have and therefore no need to spend the money to change it out at this time. He said it was definitely necessary to replace the flexible hose installed by Lowes with an all metal product, after which he would test the airflow to see if the vent needed to be cleaned, and if it did, that would be an additional charge. He provided specifics on what it would cost every step of the way. He pointed out a mysterious soffit in the ceiling in the corner of the laundry area and said he would guess the vent does a couple of turns inside that soffit, but there was no way to check that without going through the sheetrock. After replacing the cheap flexible hose installed by Lowe's, the airflow was still blocked, so I told him to go ahead and clean the vent. He did that from both ends, and it took a while, but after he did that my airflow was decent. Not 100%, but good enough for my dryer to run safely and efficiently. I paid a total of $252, including a $39 trip charge, and to me it was worth every penny. He was also very tidy. He wore shoe covers to protect my floors, and blew the debris off the patio after working out there. I'll have him come back in 2 years to clean the dryer vent again. I highly recommend this company.