After reading reviews suggesting that the large size might not fit under flight seats, I opted for the medium in black. It serves as my ideal personal item, seamlessly transitioning between flights and doubling as a practical gym or work bag. The vented shoe compartment is a standout feature, perfect for storing shoes or even lunch without worry. I appreciate how it helps prevent odors from lingering, particularly when carrying gym shoes. While the bag’s lining isn’t entirely waterproof, it offers better resistance than canvas, ensuring my belongings stay dry even in light rain. The multiple compartments aid in organization, making it easy to access items on the go. However, the outer bottle pockets can be challenging to use when overstuffed, and the absence of a dedicated laptop pocket is a drawback, although this was clear from the product description. Additionally, the lack of rigidity in the bag can make it difficult to stand upright when empty. Nevertheless, despite these minor issues, it remains a five-star choice for me!