Based on our own experience, these copper heatsinks provide excellent cooling performance for our laptop. The installation was easy and straightforward. The copper material feels solid and durable. Our laptop now runs cooler and quieter even when we're doing heavy workloads. The only downside was that the adhesive wasn't very strong, and we had to use additional glue to secure it properly. Overall, we highly recommend these copper heatsinks for anyone looking to improve their laptop's thermal performance.