If it is Getawaytoday that they are offering it, be very careful. They are a legit company; however, there are apparently many restrictions, which is a real shame. For example, if you want to extend the stay, you can only do so through their hotels or you would have to book your own return flight. Also, dates may be limited based on how many deals have been used at the hotel you want during your timeframe.
But, by buying through Tippr, you are basically given a money back guarantee as I recall, but be aware that if it is more than 30 days after purchasing you may only get credit on Tippr back.
Just a few words of caution, but Tippr is indeed legit.