I use the DNS address & exploit host by Al-Azif, never had any pkg install error. PS4's pkg install speed is so much faster when being compared to PS3.
One thing I do notice though is that, after I've successfully inject the PS4HEN payload, if I immediately click to open any game, my PS4 will crash & shut itself down.
If I wait for a minute or 2 to let the PS4HEN payload fully stabilize itself (Hell, the game lock icons will even disappear if you wait long enough) before I click to open any game, the game will load successfully.
And for those that are having FTP connection issues, please make sure you manually enter your IP address, Subnet Mask, Default Gateway, Primary & Secondary DNS.
When you open the PS4 Network View Connection Status, the IP Address Settings should be in Manual mode, not Automatic.