1.) Is this the easiest way to quickly connect and disconnect the Mac from the display?
2.) Will photos and video from the Mac look good on the display?
Thanks!
If you want full resolution on that 30-inch display, then you need the listed mDP to dual-link adapter. Apple's is almost $100 - and Monoprice has a similar one for less than $75. Apple's provides a USB connection to the display. The Monoprice adapter uses USB for extra power, but not for connection to the USB ports on the display. Both give you the full res video, however.
And, yes, photos and videos will look good.
simsaladimbamba meant "supports the 2560 x 1600 pixel" - I'm guessing