Benefits of latex tubes... Are they worth it? Is using latex inner tubes worth it?

My use of it would be on a racing bike, for training and racing purposes, only on road, mostly in good condition (but in an urban environment so there are some worse spots...).

I ride on a set of Conti 4Season 23mm tyres which weigh 230g each and I love them so far (have them also on my touring bike and I suffered 2 punctures in 10000 km, find them fast and grippy).

My current tubes are 105g and the latex ones I am looking at are 82g so an overall gain of 46g on the whole bike which does not seem completely negligible since it is a moving part...

As I said, I intend using this on racing and training, so I will never ride without a track pump more than a day so pressure loss should not be a problem assuming it can keep enough pressure for a couple of days (I am saying two because I need one whole day of fully usable pressure). So will the pressure be an issue for me?

How about comfort and rolling resistance? I read here and there comfort is increased and resistance is lowered. How noticable is it? and again: is it worth it?

Also, I hear the elasticity of latex allows it to puncture less and even when it does to lose pressure slowly (compared to butyl) and ride home with a few pumps. It that true?

And when it does puncture, can it be fixed with regular patches?

Finally, are there any precautions to be taken while mounting it, pitfalls to avoid and so on?

Overall, is it worth it?
Pros of Latex Tubes
Lightweight compared to butyl tubes
More flexible than butyl tubes, leading to a smoother ride.

Cons of Latex Tubes
More expensive (about 3 to 4 times the price)
May be more susecptable to blowouts.
Should be powedered with talc before installing to reduce stickyness and avoid pinching.
Looses pressure more quickly due to more porus nature, you need to pump before every ride

You'll probably notice a difference using latex tubes only if you are running higher TPI road tires. A higher TPI tire (100TPI+) is going to be thinner, more flexible, lighter, and have lower rolling resistance than a low TPI tire. The Latex tube will help when using these tires, since it's flexiblilty will compliment the flexibility of the tire.  Ultimately, this will give a 'smoother' ride because the tire will be able to conform better to the shape of the pavement and be very light. A standard butyl tube would add more rigidity to the flexible tire, reducing the benefits of the more flexible outer casing.

However, if you have a very rigid tire, then it will not have as pronounced effect, in this case, you're probably not going to care much about the difference in tubes. So if that's the case, just run standard butyl tubes, because you won't notice much of a difference.

From what I can tell, You can mend punctures easily with ordinary patches and glue. Sheldon Brown recommends using a piece of old latex tube cut in to a rounded shape and attaching it with tubular rim glue (regular vulcanizing fluid from a patch kit can be used but does not work as well)

If you already have nice tires, and a smoother ride and weight savings are important to you then it may be worth checking out latex tubes.