Sorry, then someone else posted that link, but I have seen it here on the forum somewhere. *blush*I haven't posted a link before. I only own one IT cosmetics brush, the dual ended complexion brush and the dupe in the five I bought is exactly the same.
Of the others I can only speak for the dupe with nothing to compare to from IT.
The big powder brush is soft, dense and feels luxurious, the flat foundation brush works like the rainforest of the sea one from tarte (I actually prefer it) however the handle wasn't fixed firmly in ferrule and I had to wiggle and re fix.
The eyeshadow brush is good but the short dense end is great for lining eyes in a gentle way without having to smudge out. The dual fibre blush brush seems a little sparse, I have only used with powder blush but it did give a natural cheek look.
Hope that helps and makes sense! I'm happy to answer any other questions you need answering :sun:
Anyway, I as a one-brush-person think that I need one or two ;-) more brushes and was looking into the Real Technique ones, the prices at iherb are very good compared to the prices here in Germany or at Boots. The Core Collection is only $9 at RT directly but I cannot order it because I cannot change the country in the address field. That's a bit weird because they do ship to my country, it says so on the webpage.