I've read several very keen reviews and now Lisa Eldridge is raving about it on her website. Excellent for medium coverage, glow, radiance and all that jazz and has SPF 30 too - apparently. All the stuff I look for in a foundation 
I was seriously considering a Chanel-related foundation splurge but thought I would check out the S&B views first. The Bourjois is £10, the Chanel is about £36 and I am always up for a bargain, but could also have my arm twisted if the Chanel is worth the extra spend!