Seven Seas are very good. It's a door to door service. I only sent clothes, books, some framed pictures and personal items of sentimental value which I couldn't fit into 2 suitcases. Everything else I binned. 7 Seas give you a weblink and you can see how your items/ship is progressing real time. I had no issue with customs I guess as the goods were used and with no real value so nothing charged.
The more you send size/weight/value costs more and is it worth it..?