I like the concept of the website but if you ask me about the administration & trust of the website then they lose very badly in that. I was denied payment once but paid 4 times among my 5 redemptions.
The Big Question is - Do they Pay?
Answer: Sometimes(it seems like the will of the website), the whole payment system is behind the scenes. Once you click on redeem the whole bank balance goes zero. But the better thing is that they pay very fast if they pay(takes 3 days only)
Had their pay system been more transparent then the website would be the best thing to earn with social interaction.
Apart from the earning aspect the thing that I like is the fact that they provide dofollow backlinks (PR 4). I hope they will keep them dofollow.