nickstamoulis - 2:49 pm on Jan 17, 2013 (gmt 0)
There is nothing wrong with giving customers your URL so they can leave a review. I have never heard of Google penalizing a website for getting too many reviews from a direct link. After all, you want to make it as easy as possible for someone to review your site, right? My only concern would be if 25 5 star reviews popped up overnight---that looks a lot fishier to me. But as long as they are legitimate reviews you should be fine.