Fits the M15 real nice. Just a bit more space left for some cables, controllers, mouse, etc but full size headphones are a squeeze in their “designated” pocket. You can’t pack much but for a nice technical pack for gaming/accessories, it does the job. Looks and fits nice too!

My iPad Pro 12.9, Alienware m17 r4, power adapter and cables for both and a Xbox controller fits with room to spare

This is a very nice backpack for the m17 slim 17" Alienware laptop. I'm glad I bought it. The zippers are sturdy and the padding seems to be sufficient. The straps are easily adjustable for my shoulders.

I tried quite hard to find a stylish and durable backpack for my MacBook Pro 16-inch and my iPad Pro 12.9. This backpack comes with thoughtful padding to protect electronic devices, and small pockets for headphone, mouse, keyboard, power supply. Highly recommended for anyone that wants to have a backpack for a complete setup of your mobile workstation.

I bought this backpack to carry around my Razer Blade 15 which I just recently purchased. The Razer Blade 15 fits perfectly snug into the inner sleeve that's inside of the main compartment and you can even throw in a few pair of pants and shirts in the main compartment as well, among other things, of course. I wouldn't suggest using this bag as a carry-on or anything, but if you're doing some light traveling over the weekend or something like that, it should suffice.

Overall it's a pretty efficient bag and it's exactly what I was hoping to get. I've been using it for over a month and haven't had any issues, it sems to be well made, unlike the Razer backpacks (there are plenty of reviews of their bags coming apart within only a week or so of use, and that's why I opted out of buying a Razer backpack and decided to go for this Alienware backpack). It doesn't have any unnecessary pockets/compartments, and as a result looks very sleek and minimal which is what I wanted. It's a very efficient backpack for carrying your laptop around and some extra goodies.

It's perfect as a laptop travel backpack. The two side pockets are ideal for storing the power brick and power cable. The inner sleeve that houses the laptop is very soft; some sort of microfiber, I presume. The upper compartment is a great place to store additional cables/peripherals and even has an inner pocket lined with the same microfiber that's found inside of the main compartment sleeve that houses the laptop. You could put your phone in there or anything that you don't want to get scratched. It's a nice touch.

So, yeah, if you have a Razer Blade, it'll fit in this bag like it was made for it as I'd imagine any thin, 15" laptop made in the last decade would also fit as well, lol.