Which VPN service seem to work well with all your Mac devices?

[SolidGun]

I am looking into implementing VPN setup as I am using more and more public connections and I would like to hide some internet traffic to avoid spam.

I don't have the iPhone and will not own one until they leave AT&T network.

So I need something that works well with Mac Pro, MBP, iPod and iPad from your personal experience.

Thank you in advance.