I know a bit about hair straighteners. I've used two conairs before and thought they were just ok. One was bare metal and one was ceramic coated. I haven't seen the one you linked to in person, but I'd be afraid of the tines catching in my hair or not being able to smooth it enough. It looks interesting that it can be used on wet hair. But then it might take it longer to straighten - if the wet hair cools the heating element. Just thinking out loud.
I now have a BaByliss (I think, or Chi, the name is worn off) professional straightener. I got it as a Christmas gift at 3-4 years ago, so I don't know exactly how much it cost but I think it was quite a bit. Over $100 for sure. But I would never ever ever ever ever ever go back to the drugstore ones. Mine heats quickly, smooths my hair quickly, and leaves it soft and shiny. It feels and looks like it does when I leave the salon and I could never get that it with the other straighteners. Considering how I went through 2 irons in 2-3 years I'd say the price is worth it for me.
Hope that helps a bit.