They've probably gotten better since I looked in 2012, but at that time, they weren't much cheaper and they had both superior and inferior properties. IIRC, the

They've probably gotten better since I looked in 2012, but at that time, they weren't much cheaper and they had both superior and inferior properties. IIRC, they had less imperfections in the crystalline patterns but more impurities that lead to a more yellow color because of impurities leaking in during fabrication. So they were kickass for practical uses, but didn't look at good. Maybe they are overall superior now.