latex tubes are super light, like condoms instead of inner tubes. lighter is better, and they also feel better as there is a closer fit inside the tire, so there's less internal friction as the wheel turns. but at high pressures, there's not much stopping the air from squeezing out between the latex molecules...
trick with tubulars ios to pay big money for them.. cheaper ones are false economy, as they are lumpy and flat readily. can't really help it when you ride over a staple but kevlar and vectra bands are worth all the extra money for most road debris and glass. expensive tires also have better carcass and valve building, so they are less lumpy even before they're on the wheel. the Vittoria rally or the contintental trainer, for example, is OK but not great, Evo Corsa and Continental Sprinter are great.
gluing is a bitch, especially when it's cold. in warm weather, with a well stretched tire, it's easier than clinchers if you're a gorilla at the first section of the tire and stretch it well on to the rim right from the get -go. that allows the last part of the tire to be mounted with the same tension as the first, and then there's less lumpiness, and more even rolling resistance.
i used to get maybe 5,000 km from rubinos. weird, hey?