I don't know if improvements have been made to the kit, but I did not have any of the issues I have seen in other comments. I wish the brush handle was 15' instead of 10', but I was able to work around the 10' length.I purchased this kit to clean out the dryer vent in my rental house (landlord claimed it was clean, but I was able to pull handfulls of lint where the vent enters the wall). The full run of the vent is 26' with three 90 degree elbows. I only turned the vent brush clockwise on the assumption that turning it counter clockwise might cause the brush head to unscrew. I was able to make it through the elbows by putting a slight bend on the wire just after the brush head, then pushed/pulled the handle while rotating the brush clockwise, this got past all of the elbows. I used the brush from both ends of the vent, pushing the brush in as far as I could shove my arm into the vent (this left a couple of feet of vent that I couldn't reach). I also purchased a 30' piece of 1/8" cable. By attaching a couple of supermarket shopping bags to the cable, I was able to blow the cable through the vent with my shop vac. I then attached the cable to the end of the brush handle and pulled the brush all the way through the 26' vent (and repeated this twice). My shopvac (5 gallon capacity) was about half full of lint when I was finished cleaning the vent.Vacuum attachment was too small to fit on my vacuum so I put a couple of turns of duct tape over the end of the attachment until it would slide snugly into my vacuum tub. I used the attachment to clean my dryer through the lint trap, and to clean out the A/C vents at the registers in my house.I haven't used the "bottle brush" at all, I was able to clean everything I needed to with the vent brush and vacuum attachment.
Easy to Clean,