Been using unblockUS for almost 2 years now and its been working flawlessly. You can even switch between regions for netflix now.
Swap to Canada to watch some Dexter/movies only available in Canada (i know right?)
Swap to US to get more TV/movies
Swap to Mexico/Latin America for other movies like Hunger Games.
The swap is done on the website and takes ~30 seconds + a log-out log-in of Netflix.