I have used that one but as it is designed for shooting unless you are using a very long prime lens it is impossible to shoot whilst sitting comfortably.The flap is just too far away for the end of the lens to reach but I use a Sigma 50-500mm which is quite short.I tend to have to lean forward in order to reach the camera.
This is the one I use for pretty much everything as the camera can reach the shooting apertures easily and it also has mesh windows for viewing on all three windows.It fits 2 photographers comfortably and is sturdy and waterproof.I paid £64 brand new off Ebay.
IMG_5449 by
Mike Warburton Photography, on Flickr