The G10 dice cradle is made of ABS, a hard plastic.
I'll admit that the majority of people I talk to think it's cool, but see no personal use for it.
Each tray makes it clear which dice are being used for each player's score, and protect from accidental bumps.
Games where the G10 is extremely beneficial (as suggested by my 300+ G10 Kickstarter Backers) include - Magic: The Gathering, EDH, Commander, Star Realms, Hero Realms, Aeon's End, Exceed, D&D, Munchkin, Gloomhaven, Pathfinder, Guild Ball, Sentinels of the Multiverse, Hearts, Spades, Qwirkle, Ticket to Ride, Clash of Clans.
G10 Spin-Down Life Counters now available on Etsy & eBay.