I've got the Ozone bag and it's great cause it's very durable and it's light allowing you to take more gear, which is also the downside too. Been on a couple of trips and trying to lug it around with a backpack is a mission, and I took way more gear than I needed.
That said I am now more travel wise and will not walk 1-2km to catch a train to the airport.

If your strong enough and don't have to walk far go for it.
I am considering buying a bag with wheels though for the next trip if it doesn't sacrifice too much weight, or a triple coffin surf bag if I make it over to Indo this year.