Great tunnels
I bought two tunnel kits about 4 years ago, and they have held up great. The plastic , though 4 year, is still going strong enough. I even moved them to a new location and there is no sign of any rust or wear on the steel posts or boughs at all - as expected. Properly secured I've had no issues with high 70 mph winds, either. My only comment would be to change the ropes to be individual sections instead of one long shoelace style, use trucker's hitches and its much easier to tighten individual segments as they become loose and the rope stretches out. I did this and its a lot better, and less risk if one rope breaks the whole sheet doesn't come free. For Tunnel Vision - feel free to email me if you want pictures of what I'm talking about.
