I received my Yascom 30L Trunk/Storage Case yesterday. It arrived quickly and in great shape. I read the reviews before I bought it, so I was prepared for issues installing it and I knew how to securely lock the trunk onto its base & how to remove it. It comes with literally no instructions, so the reviews made installation & use MUCH easier. It's actually easy to install but it helped to know it has to be unlocked to secure it to the base and I appreciate the advice to use lock washers. As to actual use, it's fantastic! I'm using it on my e-bike and it hold a ton of stuff. I had been using a very nice & large wire basket. I could stack it really high but that focused all the weight over my rear tires and made my bike feel less stable. This trunk holds much more than my bike basket without have to stack things so high and the weight is distributed out beyond the rear rack. I feed community cats at night so I carry a gallon of water, dry food, several cans of wet food, paper towels, &, often, a jacket in case it gets colder while I'm out. I put all that in the trunk last night and had room for more, WITH the top closed. I even added litter for some other cats I'm caring for between the trunk and my seat. The ride felt more stable and everything was out if view and somewhat secure when I stopped at a store. Obviously, the lock could be broken if someone really wants to do so but they don't know if there's anything worth stealing inside and it would be obvious they were breaking in to other people in the area. My cat liked the basket better because she could get into it from the seat but she's adapting and I love this trunk.