I was a bit skeptical of this shirt after seeing some negative reviews of it on another, identical product listing (http://www.amazon.co.uk/Doublju-Casual-Pocket-Checkered-Shirts/dp/B00AEL9A9C/ref=pd_sim_ap_2) which suggested the sizing was ridiculously small, but having bit the bullet and bought it I can say it's great.
I'm a 5 foot 7 guy with a slim but (ever so) slightly muscular frame, I bought the shirt in a "small" and I had expected it to be a bit tight but if anything it fits perfect. The only slightly negative thing I would say is it doesn't fit as well as the picture suggests - I imagine the one in the picture has been pinned back to make it look better, and that's the reason I docked it 1 star.
The material is lightweight and quite soft, and it seems well made (though I haven't worn it much, so I'm yet to see how it stands up to a bit of wear and tear.)
Overall it's a nice shirt, feels nice, fits great (but not perfect) and I would definitely buy another.