There are numerous complaints about the 5k display so Apple removed all the reviews on the 5k model. You can see below, that the 4k model still has reviews up.

There are numerous complaints about the 5k display so Apple removed all the reviews on the 5k model. You can see below, that the 4k model still has reviews up. http://www.apple.com/shop/product/HKN62LL/A/lg-ultrafine-5k-display http://www.apple.com/shop/product/HKN62LL/A/lg-ultrafine-5k-... http://www.apple.com/shop/product/HKMY2VC/A/lg-ultrafine-4k-display http://www.apple.com/shop/product/HKMY2VC/A/lg-ultrafine-4k-...