I have used these before, just not from Encell. It seems that a number of companies buy these products from a manufacturer in China then rebrand them to their own name.The good:These litter bags do a good job of containing the contents, and the elastic is real good at retaining products and odors. They wear really well. My last ones lasted about six or seven years before tearing down the side. I like the option to purchase in so many colors to adapt to the interior of so many vehicles. The black colored bags, that are so common, are too much contrast for the majority of vehicles. You don't want your litter bag to be the center of attention in your cabin.The neutral:The manufacturer widened the width of the straps, but my old bag self-destructed before the straps could fail anyway.The bad:The straps on my old bags are about 6 inches longer than these bags. It used to fit around the two posts on my head rest mount, and the bag rested below the top of the seat. Now you need to stretch the strap to get it to barely fit, and monkey around to get it to snap together. After all of that, the bag rises above the top of the seat back and remains too high to be practical. It also looks terrible. Then it stretches the elastic, making items harder to push trash into the bag.F/U - My headrest posts are 6-1/2" wide and about 1/2" diameter each. The strap adjusted at its widest setting is only 10" wide (see pic). That leaves less than 2-1/2" for the bag to fall below the top of the seat. It was just too hard to get items into the bag on two posts, so I just hung them on single posts. The first time that I tried to push an item into the elastic opening, the strap slid out of its plastic connector, and the bag fell onto the rear seat floor. I looked at the connector, and I saw that there were four teeth that were molded into the connector to restrain the strap from easily sliding out. However, there was a straight edge (incorrectly?) molded over the teeth removing the grip that the teeth could offer (see pic).I give up. I'm returning them.