I should just auto deliver them because they are awesome! I'd love to try the reusable wet/dry version, but it's cheaper and I'm seriously not interested in cleaning the weird filter after vacuuming up dirt and debris. They work well depending on the type of things you're vacuuming. Large parts tend to get stuck in the folds, while fine dust tends to slip through and be thrown out through the opening. If you're vacuuming gravel, sand, etc., it works great. They are very easy to install. I don't have a shop vacuum. It's another brand that uses this size filter. It's held in place by a thumbscrew, just unscrew it (bonus points for nail-friendliness), remove the old cartridge from above the bin, slide this over the spindle and retighten the thumbscrew. Light. The only tricky part is picking up the vacuum motor part to attach. She weighs a ton! But the filter itself is easy to get. I throw away whatever is hidden in the trash can before I put on a filter and wipe down the whole block. I try to keep as much dust and dirt out of the house as possible. last few weeks or months. My last one was about a year old and saw a lot of dirt, sand, sanding dust (from plaster for example) and it was pretty well received when I got it. Most of the heavy construction is already done, allowing this filter to last much longer. Great price and oh my gosh I'm so glad it can be easily delivered and I don't have to go to the hardware store!