I have loved Le Volume de Chanel for years and I thought this would be like it, but even better. However, it has a cumbersome, sharp brush that makes application a chore. It does give black, thick lashes, but almost no length. You can get the same results from any drug store. And it seems to disappear as the day goes on. It just doesn't have the substance and lasting power of Le Volume de Chanel and so I will be going back to that rather than using this one. The brush is a marketing gimmick which doesn't work. This is not the worst mascara, obviously. I just don't like it because I expected it to be better, based on all their boasting.
Update: I've used this several times now and even though it's a tiny sample and there's almost nothing left, the small amount of product left is giving me superior results. I am now used to the brush and I like it. I will probably buy this instead of Le Volume de Chanel. I was wrong in saying it's no better than a drug store mascara. I've compared photos and it doesn't come anywhere near the clumping and flaking and general uneven look of almost all drug store brands.
I do believe the right technique has made this work like a dream. First I used a face cream so that it made a better canvas than dry skin. I built up the lashes using 3 coats and then let it dry. I put on a very light brown eye pencil and a tiny bit of pale blue and grey shadows. I applied concealer, powder and blush and highlighter. Then I added a 4th coat and it gave more length. With too much eyeliner the mascara can't be seen as well. Also the lip colour cannot be too dark. It has to be a neutral with some sheen, not red or coral.
I've changed my rating because I have learned to appreciate this mascara.
Note: The tiny sample is all gone, but I have used the brush to apply other mascaras which don't work, and it made them work. So I learned that some mascaras just come with a bad brush. This brush took some getting used to but now I see it is a superior design.