I recently received the Amika Polished Perfection Straightening Brush and I love it. Here is a picture of my hair before and after and it only took 4 minutes! - I timed it.
Overall, the brush makes my hair smoother and shinier without reducing volume in less time than any hot tool I have ever used. I have a lot of hair, and have been searching for a product that will make it look polished with minimal effort for years. The Amika brush does just that, and at a price tag that's a lot lower than most hair tools out there. Further, I've used it after I dried my hair with a blow dryer, and after letting my hair air dry, and it delivers amazing results either way. Simply put, it's a game changer. It makes my hair look smooth and polished with almost no effort.
If you are in the market for a new hot tool, get this one! I highly recommend it.