My son said this raised his game a notch. He wears weighted in practice and these in games. These are 1oz (30g) lighter than his previous name brand lite guards. We also got him shoes that are 1 oz lighter so we are saving 2oz each leg. He says he feels it and notices more energy towards the end of games and long tournament days.
These seem indestructible and will last until he outgrows them. He also said they work for well for protection. He has taken a few cleats with them. No issues.