I bought this as a gig bag, not to hold lights or whatever it was actually intended to be used for. :-)
It's made of really thick, padded material and has chunky big zips - although they are quite stiff. Hopefully they'll loosen up with age.
I was looking for a gig bag that was big enough to hold mic leads, guitar leads, power leads, mains extension lead, a small folding guitar stand, spare strings, tools, microphone etc etc. Everything that you need as a gigging singer/guitarist basically.
It does the job perfectly, and far better than a ruck sack as the top zips all the way round so you can get at things easily.
It's got one large outside pocket too which is great as that's where I store my spare strings, a set of pliers, a cloth a tin of plectrums, capo etc.
It comes with a detachable shoulder strap too but I have it detached and only use the carrying handles because the way the shoulder straps attach - they actually foul the opening so you have to remove the strap to open the bag anyway. Bit of a design flaw there me thinks, but no biggie.
Other than that, it's great quality and would definitely buy again if I needed another gig bag - which judging by it's quality I hopefully won't need to buy for a long, long time.
Great stuff.