[new299]

They also break... ours lasted 2 years and then one of the rivets popped out.

Generally I believe you are allowed to use a different bag, it's just... uncommon.

[nephanth]

Curiosity: do they have warranty (for how long?)? Does the manufacturer take them back and perform repairs?

[new299]

I think it depends, this one didn't as IIRC we got last seasons model as it was cheaper.

[toomuchtodo]

Is this a market opportunity? To make cheaper yet more durable variants?