I have actually used HMA, IPVanish and a few others. I live in Asia and use mostly US based sites. HMA has the most servers to choose from but I did have problems from time to time as well as getting booted now and then. I started using IPVanish about 3 months ago and have never had any problems. I was also using some free proxy sites that worked well at topvpns dot org. I have not used purevpn, but have heard good this too.