Credit where it's due, there are items in her range that I love & to me are worth every penny, (usually of Ebay as it's normally about half the Q price or in a TSV).
They are:
Foundation, (beware of the dark/tan one as I had to send mine back, it was ooopa loompa orange on me)! I use her medium mixed with a bit of my MAC tan sheer foundation, bargain at about £20 for 100ml plastic bottle.
Her primers, both eye & face
Her eye cooling prep gel, (extortionate on Q at £29.99 plus p&p but about £15 on Ebay). It has mixed reviews but I love it, refreshes my eyelids & underneath a treat, also been fab for when I get hayfever in the spring
& of course her black mascara, the best I've used
I'm not a huge fan of her eyeliners as altho' they're bullet proof on the back of my hand when I tried it initially, I found that they didn't last long on my eyes for some reason. Quite a few Q reviewers say the same