My friend dapper scrapper has already done a review on this site, so I will not go over all that, instead I suggest you visit the article yourself -which you will find a link to at the bottom of the page.
What I want to do is talk just a bit about how to actually get the points, it took me a few minutes to finally figure out exactly how it's done. You conduct your search, say for guitar tabs, and when the list comes up, visit some of the sites. At the right hand side of the top of the page of the site you go to, you will see a small "comments" box. Write in any comment you want, but do write in a comment, as the comment alone will earn you 5 points.
Right below the comments box you will see DO YOU RECOMMEND THIS SITE? I click yes, but either way, it will earn you another 5 points - just remember to leave the comment first before you recommend. If you recommend first, you don't get to leave a comment, which costs you a chance at another 5 points.
Now a thank you page comes up, here is where I had a hard time figuring out what to do next. Below a big gift box is is a smaller box where you either answer a question, select an answer from several choices, or type in a code.
If the box say to play to reveal the security code, press play, then write the code, I happen to get a lot of Play Xbox LIVE codes. Other times, you simply get a code spelled out in the box next to an ad, like Norton Security, the code might say "Norton Top Security" or something like that, simply type the code, minus the " around the code.
I highly recommend this site, but I also recommend you visit the review on the site below, as it contains useful information I did not touch upon here. You will also find a link to the iRazoo site there as well.