I used a Bobbi Brown eyeshadow brush back when I was a total noob to makeup application (last May) and was very impressed with it, since then however I have bought my own palette and the brush just doesn't seem as good, I don't know if it's because I'm improving or because the brush I have is a mini version..the brush just seems unnecessarily boofy and fluffy but it does pick up a lot of colour.
Her longwear eyeshadows stay on me for ages, I wore heather shimmer or something similar the other day with UDPP (was testing out looks at home) and it stayed on all day and no creasing.
I LOVE LOVE LOVE the gel eyeliner, application is sooooo easy with it and you hardly use any, the only problem I've had is the fact that the brown one doesn't show up on my Indian skin unless I wear eyeshadow under it (I can wear the black one alone). It stays on all day without any UDPP on underneath it and I will deffo be buying it again.
I have used the Shimmerbricks as highlighters in the past and they are great as is the corrector.