Ranked in these QuestionsQuestion Ranking
Pro Good image quality
Vibrant, sharp & good overall color responsiveness with 1.073 billion colors and a 5ms response time.
Pro Full swivel stand
You can turn it fully to a horizontal or vertical position.
Pro Good selection of connectors
Dell P2815Q has HDMI 1.4, Thunderbolt, 2 DisplayPorts (1 in, 1 out) and 4 USB 3.0 ports. HDMI 1.4 & Thunderbolt are capable of 4K @ 30Hz.
Pro VESA mount
So you can mount it to a desk stand or a wall.
Con Bad viewing angles
Since it's a TN monitor, it has worse viewing angles compared to IPS displays.
Con Bad refresh rate
At 3840 x 2160 it's max 30Hz and at 1920 x 1080 it's max 60Hz.