My Opinion of one I own.
I ordered one of these a while back and they do run very small, I bought a Size 38 and it was very tight, they size very literally to actual measurement. Order a size up if you want to be comfortable in this shirt.
As for the design it's very nicely done, a subdued woodland splotch pattern, complete with very high quality snaps and pockets, and a neat little Norwegian flag. The Pockets are the nicest part of the uniform, perfectly velcroed and lined with a blue plastic-like material to prevent fraying. It's very stiff, but this wasn't meant to be a combat shirt, it's a utility uniform suited for day to day use.
If you want something that looks sharp and is unusual, you should buy this. There are very few of these on the Surplus market, especially in the US.