I'm not a fan of the BareSkin foundation - it just doesn't look or last that well on the skin. The brush is a waste of money as well - a Real Techniques Expert Face Brush or Buffing Brush works better IMO.
I asked for a sample but I was told I couldn't have one.
I react really badly to bismuth oxychloride - it's the ingredient in many powders including mineral foundations that give the pearl effect on the skin. Some Bare Minerals mineral products, including some of the foundations contain this and I get deep spots/boils on my jawline if using these products. I don't generally have massively sensitive skin, but wearing this for 10 minutes makes me so itchy. Next day I'll have massive red sore bumps on my face.
It does depend on your skin type, so you might find that the products are amazing. I just don't think they are worth the money.
I'd recommend getting a light/medium coverage foundation and a concealer for blemishes. Then a powder to set it all.
I would suggest Laura Mercier foundations/tinted moisturisers - they are good at giving samples IME and the quality is great. They have something for every skin type. I also like Estee Lauder Double Wear Light.
For powder, I really like Mac Mineralize Skinfinish Natural and Select Sheer Pressed. But many other brands do great powders - it doesn't have to be expensive. I like the translucent powders from Essence and Nars, and Guerlain Meteorites and Chanel Les Beiges.
Mac lipsticks are great, but the cheaper brands are also good - Bourjois, Revlon and so on. For higher end, I like Laura Mercier, Guerlain (Rouge G, KissKiss and the Automatique ranges) and Chanel. Clinique are good too.