If you play the Clans, you NEED this book. Great data on all the major Clan 'Mechs. Some say it's not as good as TR3025 or TR3060. The books cannot be compared. 3025 was IS only. 3060 included a whole lot of Level 2.5 tech, and introduced ProtoMechs. But 3050 was just 'Mechs, Clan and IS. The new IS Mechs aren't that great, and some aren't well thought out, but you must remember that at this time 100% of FASA's creativity was directed toward the Clans.