I've been using such a service here in Norway.
I got a mailbox in the US, (Asia also available). The US company sends the package to my US mail adress. My Norwegian freight forwarder service 'polls' this box every 2nd day. (I think it is) together with many other boxes for other people.
Sends it to Norway all together, this makes the shipping cheaper.
The forwader does all the custom clearance, and the package is shipped with The Norwegian Post to my door, all whitin 7-10 days. The postage prices are based on weight, so it it normally pretty easy to know what the cost will be.

TommyE