The product has the ability to run all five just a few glaring problems. The first thing to do is to remove the coated underside, which shows signs of wear after just 2 days of use. Next we have the zipper of the main compartment, if it were in the same plane as the surrounding fabric it wouldn't be that difficult to close as the zipper is against the surrounding fabric. Also, I'm just waiting for the weight of the tools in the bag to rip apart the laptop compartment since the full weight of the bag is on that one zipper. Perhaps the side slot method closed above would be the better alternative. Hard rubber without a coating is suitable for the underside. But how should I know that I am only a technician and not a tailor.