I already have the L'Oreal Miss Manga mascara in purple and liked it so much that I thought I'd buy the blue one too and... wow!
I absolutely love it. The purple one gives a subtle hint of colour to your lashes but the blue one just says "Hey, look at me!" which is great for when you want to add that pop to your look.
You can use this to create a natural daytime look with a twist (as seen in the pic) or a funky look for a night on the town.
I've been looking at other peoples reviews about this mascara and the general consensus is that it is a decent mascara for a variety of looks.
I think that wearing it on both the top and bottom lashes at the same time may be a bit much, but wearing it on either works a lot better.
I would definitely recommend this product to others.