I've bought from these guys many times now. Well worth it. Much cheaper than anything that we have available in Australia.
Customer service is great - Sommer sorted all of my queries and added in my last minute extras.
The only thing that annoys me about this site is the distribution restrictions on some brands but I'm not sure that it's so much a fault of hockeymonkey's but rather the actual brand owners. I had a custom jersey made (not the authentic one just the replica) and it turned out great. It's obviously got a different feel to it than the authentic ones but it's less than half of the price which is nice.