I have owned several shelter logic products and the 10'?20' peaked auto shelter has been my favorite the frame is just bomb prove never an issue aside from occasional tightening a bolt wich is to be expected. The issue has been the covers Ive had both the standard 5ml and heavy duty covers now the heavy duty cover is a vast improvement the exta thickness and weight improve the shelters handling of wind little to no flapping and snow little to no sagging. It lets much less light through so a consideration if your not electrifying your shelter. The one issue ive had with both is over time the covers statt to develop little pin hole along the crease lines where the cover was folded for shipping and the fact that the companies only patching solution for a cover that was several hundred dollars is essentially color matched duct tape or get a new one is an issue for me. I would like to see some kind of patch kit or somethingalong those lines even if it was something I'd have to purchase at cost. I think there has to be something the company can changebin the manufacturing process that can prevent this issue. I will say the heavy duty cover does not frey or tear any further than said pin holes wich is an improvement over the standard. All in all an vast improvement over the standard cover if not for the pin holing i would give a 5 out of 5