Excellent product, sometimes snooty sales personnel
Christian Louboutin shoes are so elegant and have so much prestige that the salespeople don't have to do anything. I saw another comment about wrong sizes. There are different sizes in Italy and the US and most women think they have bigger feet than they actually do and once they get the right size, they feel much better. I am US size 5 1/2 and Italian 35 1/2 but wear 36 in other brands. It depends.
Back to Loubi, these shoes are the best way to pamper yourself. Take your time, walk around on the red store carpeting. When I go, since I have small feet, they usually don't have my size. They don't have lots of sizes anyway because it LUXURY.
But go regularly if you are in the neighborhood and like to shop. If you get the right pair, I swear you won't regret it. They are elegant, walkable, and make skirts, dresses and pants look very sexy.
I recommend no higher than 10cm because after that they have platforms under the sole and they are hard to walk in.
I love the "classic" pump which is the easiest to walk in of the high heels or if you have narrow feet, the "jazz" pump. For tall women, look at Carla Bruni, she almost always wears Louboutin flats.
Take your time, choose wisely, it's an investment. Also, to prolong the life of your shoes, when the soles start to get used, take them to a shoe guy right away to add a new sole in rubber. They don't make red ones yet, but I just get them in black. You can also get the tip of the heel replaced.
These shoes will last a long time and be worth the investment if you know how to care for them.
Have fun!