Well constructed backpack. I bought this for my Q5004K. The outside secures the Q500 very easily with landing gear pockets and velcro. The full flap covers the rest of the Q. Since the CGO3 camera stays mounted, you just have to be careful as there is nothing protecting the lense as it sits facing up. The outside Flap should really be be designed to fold from top to bottom to cover the camera. The Motor pockets were a nice touch to keep dust and debri out of the motors. This isn't a large bag, as it will just carry the essentials - I was able to fit in the transmitter, 4 batteries, sunshade, Itelite DBS antennae kit, spare Tx battery and set of props. I wish it had dedicated pockets for the props - you just have to pack them carefully to avoid damage. The backpack fits comfortably for cycling or motorcycle use. Would be perfect for hiking use as it carries just enough and you wont be tempted to overload it.

It takes a bit to get everything where you want it, but once in place, it seems secure. I've only used it once to hike up a mountain. It's perfect for a one time excursion, but personally I wouldn't want to pack and unpack it several times in a day. It's a little pricey but if you just have to have it, go for it.