Yeah, its actually great.
People complain that you have to sign up for stuff, but:
A- You can cancel it after a while, and some of them are a free trial period too.
B- If you spend £2 a week on helping an african kid with no life, even if you cancel after 2 months, you have a £200 Ipod for £16, aswell as seriously helping out somewhere that needs it.
Edit: if you do the world vision one, you can just go to your bank and cancel your direct debit