I bought this online on sale a few months ago and have been really liking it for covering redness.
The bottle was a lot thinner than I was expecting, about the size of a typical concealer. The liquid is green and has a very thin consistency. I apply it after my moisturiser and use either my fingers or a sponge to blend it in. It feels very light on my skin and is quick to blend out. Once blended out it doesn't appear green, but turns very light in colour. I can instantly see the redness on my face disappear. I like using it when I'm using a more light-coverage foundation, it makes my makeup look more natural and this helps the redness from being visible. I also find that it makes my makeup look nicer for longer and the redness stay hidden for longer.
I am very happy that I picked up this primer. The only thing I disagree with that it claims is the "24 hour hydration & moisture." It doesn't make my skin any drier, but it doesn't add any hydration either. This doesn't bother me, as I always use moisturiser and am happy with the results covering redness, just thought it was something to note!
I chose this as the third item in a 'buy two get one free' deal on L'Oreal products at my local pharmacy. I'd previously been buying foundation which promised to cover redness but also needed a primer. The bottle is a good size for your makeup bag and has a solid pump on it. I squirt it a couple of times on the back of my hand and then smooth it across my face with my fingers between my moisturiser and foundation. The green doesn't come through as 'green' and it does tone down the redness in my skin tone and make a nice base for longer lasting foundation.