The gameplay itself is good however the bonus content will not unlock for me regardless of how many surveys i do. They all seem to be broken like many other sites that offer similar things. Even with a valid email and my correct info and going through them i still get nothing. Also some of them are nothing but infinite loops. I would highly recommend that you look into this major issue soon. I can only give half the rating i wanted to give because the bonus code stuff refuses to work.
Be careful of stuff like that.