It is an interesting company with a bright future. They have a technology that is used by utility companies and other manufacturing companies to make the emmisions cleaner. They also have a subsidiary in China and if you want an indirect play on China, this is a good one to take a shot at.
I am watching them but I just don't think the timing is quite right at this point in time. As someone else wrote, they are pricey and in this market, speculative. I am waiting for one more drop. Otherwise, I just as soon wait until their next earnings comes out since they took a big drop after their last earnings were announced. If I have to pay a little more later on, so be it.