No vpn is free, they all will make you pay one way or the other so is best for you to pay with money that way you will know the price.

see it this way. we all know that vpn is a hosted service, so what makes you think that someone will hand it to you for free?

Most vpn service will always make you view their ad for some seconds before redirecting you to another site that they want plus you know that it a free service meaning thousand of people will be cramped on one ip address thereby slowing down your Internet speed.

most free vpn users normally use vpn for illegal activities so most secured site might have black listed the free ip address your free vpn allocated to you plus you have a public ip address meaning any body can find it.
The list goes on and on..

Well the only good side to it, is that it is free but I personally think that it is not worth the risk and stress.

Going for cheap quality vpn services
Is what I will advice, you will get a good list of that on this site www.downloadvpn.org