Love it! I needed to replace a much loved bag. It's made from a similar light weight waterproof material. I love that it's narrow. Most of the gym bags are too wide. Which is a pain when you take the train to the gym and then use cubby holes at the gym. I love the mesh pockets inside. I like the felted side pocket as it's big enough to put my work pass, keys, kindle, phone and purse in. Which means that the days I go to the gym before work, I don't need to carry two bags.
The only downside (and the reason I didn't give it a 5/5) is that it doesn't have an over the shoulder strap. You can carry this on your shoulders, but a strap would have been great.
It doesn't have a separate spot for shoes. This doesn't bother me as I use a shoe bag anyway.