The Timbuk2 command travel-friendly messenger bag is a great buy! The bag is crazy sturdy and water resistant, which are the main reasons I bought this bag. You can fit a decent amount of junk in this bag, including laptops, tablets, notebooks, pens/pencils, calculators, and other daily essentials. If this thing ever wears out, I'll be getting another one. These bags are definitely worth the price!

I have a 15" MSI laptop and a 13" macbook pro, so I decided to get the small size bag (the small was on sale). To my surprise, my 15" MSI actually fits in the small bag, but just barely doesn't fit in the designated laptop pouch. Which brings me to my only complaint: I'm typically very careful with my electronics, and I prefer to have my laptop right in the middle of the bag surrounded by as much padding as possible. The laptop pouch on the back of the bag offers a fair amount of padding (about 1/4"), but not enough for peace of mind.