The set comes with four travel-sized brushes - (from L-R) a lip brush, an eyeshadow brush, a blush brush and a foundation brush.
The lip brush is nice to have, very precise and does a great job at applying lipstick. Personally, I would have picked another brush for a travel set - an eyeliner brush for example, but I guess it's nice to have, especially if you like strong lip colours, which tend to need precise application.
The eyeshadow brush is a medium at density - meaning that it can be used for both packing on colour, as well as putting shadows in the crease and blending them out. I have to admit that I don't use this brush on an every day basis, but I did use it every day for a week when I was in Edinburgh, and it does work - I got beautiful looks from it, and even managed to use it for smudging shadow under my lower lashline. So yes, I will definitely use this for travelling in the future, although I don't use it at home.
The blush brush is my favourite from the set - although that may not come as a surprise, I'm a blush gal :) It's very soft, and I used it both for bronzing and blushing - it's small enough to work for contouring, yet big enough to give a blended look when working with blush or highlighter. I would say that it's on the smaller side, but it is a travel-sized brush after all, and I do like it.
The foundation brush is to me the least interesting brush of the set - but that being said, I really, really don't like classic foundation brushes at all, this one is no exception. I feel that they leave my face streaky, and I always have to re-do my makeup if I decide to give them "one more try". I just don't understand how people can use them, to be honest.
So, do I recommend this set? Well, if you are looking for a really nice travel brush set, I think you will like this, especially if you use classic foundation brushes. The brushes are really well made, the bristles are fantastic and the handles are so classy, with the Dior logo printed so nicely on them. I'm really happy with mine.