They offer excellent efficiency relative to their remarkably low weight: in late September in central Italy, they are still generating 150W each. Their narrow, elongated shape allowed me to mount two panels one above the other on an open wall at my holiday home without one casting a shadow on the other, effectively approaching the performance of a single 400W panel. Thanks to their lightness, I was able to mount them affordably using telescopic aluminum brackets; these make it easy to adjust the tilt according to the season to optimize output, or to flatten them against the wall—protected by an overhang—during bad weather. Plus, in the event of unexpected hail, the plastic coating seems more reliable than glass. And when I leave, I simply unhook them from the wall and store them away. In short, while they aren't cheap and require a slight trade-off in efficiency, their form factor and light weight offer—in specific installation scenarios—greater versatility and a much more discreet aesthetic compared to a traditional panel of similar rated power. They suit my needs perfectly, and I am very satisfied. Shipping and communication with the seller were excellent; however, I didn't like the banner that persistently—and unclearly—promised a free picnic blanket worth €10. Only after placing the order did I discover (and it wasn't clearly stated anywhere on the Italian site) that the offer was valid only for orders over €5,000 (a €10 gift? How to get lost in a glass of water...).