I think hayabusa mean full client as in software you install so you would have an application on your laptop/desktop that you need to launch to set the VPN up.
A few vendors offer this but again its swing and roundabouts I used a VPN not so long ago and found out they were storing my password in plain text. So where I thought I was getting my data encrypted they went really securing me in all ways.
I have not used WiTopia so cant really give any advice on it.
There was an article not so long ago on Torrent Freak about VPN it might be worth reading it tents to cover downloading anonymous but still might give you better idea of different services.
http://torrentfreak.com/vpn-services-that-take-your-anonymity-seriously-2013-edition-130302/I hope this help