I was desperate to buy this t-shirt as I'm an android user and know so many technologically-ignorant Apple fans. The look on their faces when they see it is so worth the twelve pounds.
I bought a Medium as I normally do and it's a little bit bigger than most Medium t-shirts I buy, but it's not too big (I normally just wear big t-shirts in the house, but this one's only slightly bigger than normal). As other reviews have stated, the fabric and print are good quality. The only thing I'd criticise is the colour of the android; the green is a bit darker than how it's shown on the preview image. It's only in certain light that you notice though, so it's fine.
I'd definitely recommend this t-shirt, especially for the price!