I bought this bag as a replacement sling bag that I had. This bag is amazing for the size. It is only SLIGHTLY bigger than the bag I had (maybe a couple cm's longer and wider), but it can carry so much more. For reference, the bag I originally had could only carry my camera and 2 separate lenses, and that was a very tight fit. This bag can carry my a6000 (with an attached lens on it) and 4 other lenses. It also has room for my shoulder strap, extra batteries, straps, lens caps/hoods, filters, memory cards, and air blower. I haven't tried the tripod attachment part yet, but that is also a useful feature. The orange interior is also quite useful as you can clearly see the inside of the bag and quickly grab what you need instead of shuffling through stuff.
UPDATE: I had to deduct 2stars because the strap is very squeaky. I don't know if it's my one only, but I've never had a bag squeak like this before. It's VERY annoying. If mine didn't have this problem (or if it is fixable) then I would say it's near perfect.