The advantages of using proxy are: by hiding users unique IP address it lets surf the internet anonymously, protect their internet privacy and security, allow visit any public web sites in countries with heavy Internet censorship.
The main advantage of NotMyIP over Ultrasurf is its ability to automatically configure all browsers to use a certain proxy. No need to install add-ons or to manually configure browsers like IE, Firefox, Opera or Safari, just install it and the IP address is changed or hidden.
However, here at my location surfing speed is bit slow when surfing through NotMyIP. Download the program from programs home page.