Hey all you pro-prop 19 jellies: What is your opinion on K2?

I was perusing one of the glass galleries downtown the other day, and I discovered a legal alternative product called K2, or Spice. The guy working there told me that it’s a synthetic product that, while is actually an incense, can be smoked and produce the same effects as THC. However, after doing some research on the product myself, it seems like the drug is, on the whole, a very hit or miss experience.

So my question to you; Have you ever tried K2 or a similar product? Was it worthwhile? Any advice?