Anybody ever use a fibreglass trunk lid before but left it as a bolt on? Was it worth the change, or is a lot of the weight savings in the hinges?

Unlimited sells a fiberglass trunk lid for my car that should be about 25-30lbs lighter, but not sure if it is worth it if the hinges are where a lot of the weight is, as well as how strong/flimsy it might be with the opening and closing of the trunk a street car sees...I would imagine its no different then a glass hood, but then I could be wrong