Well I didn't like one of the negative reviews on Amazon. I also just checked out this review below, the lady does a great job in her review. She pretty much explains the pros and cons of this. Remember as investors we are assuming that the company MYDX will make a better product for a lower price. If they do then this will take off and big bucks will come our way. Otherwise our money is gone. Listen to this whole review if you have the time, it's about 17 minutes long and will give you a better perspective of what you are investing in: . .