No mention of a brand. The inner inflatable section looks flimsy. I reckon that you could pick up a 2nd hand well known brand double biscuit for that money. We have a Jobe' Double Trouble that was a £100 new, it's bullet proof.
You do get what you pay for: I bought a brand new doughnut for about £30 on ebay a year or so ago. Was absolte rubbish. Sold it again for what I paid for it though