First, the product is amazing. The bezel is super thin and the colors are great. Be sure that you use a DisplayPort cable (full to mini on Macs) in order to get the full resolution. If you use the HDMI connection, macOS will top out at 1080p. The only reason it's 4 instead of 5 is that the packaging and inserts seem to indicate that it's a re-certified product, which wasn't how it was displayed and advertised (at least when I bought it). Regardless. Get it.