Unable to takeover Groupon after the latter rejected its $6 billion offer, Google has opted to start from scratch with its own daily deals-giving service. That may be a generalized view and one could argue that you should only buy into offers for places you know and like. After all, it is rumored that Groupon is getting ready to go public at an estimated value of $25 billion, so they must be doing something right. What about you, have you had any experience with these deal of the day sites?