I have a BA Copper Spur UL1 and have used it for about 30 nights on all kinds of surfaces. I have always used the BA groundsheet with it. The tent shows almost very few signs of wear, and certainly no damage to the floor. One small hole has appeared in the mesh of the inner tent, and there are some patches of discoloration on the fly. No idea what that is or where it came from, but it doesn't appear to be spreading. I love this tent for short bike tours. It's light, packs up small, has space to keep your panniers dry, is roomy enough inside, and the pole sections are short enough to fit in Ortlieb front rollers easily.