I've never used latex tubes...in fact, until about a week ago I didn't even know there was such a thing. But the mechanic who told me about them last week insisted that, while latex tubes are more prone to punctures, they're less prone to pinch-flats, and so ultimately wind up being less prone to flatting overall. I then did some internet forum searching and found quite a few folks who agree with that characterization of latex tubes.

Also, this "they leak air faster" thing seems to be a red herring if you inflate your tires before every ride. I have yet to read an anecdote claiming they leak air too fast to be viable for an entire (single) day out on the bike.