I use the StarTech MDP2DVID between a Surface Pro and an ASUS PA279Q 27'' with a dual DVI cable rather than a DisplayPort cable. I had to do this because the connection using a direct DisplayPort cable was never stable after a few minutes. Hence, in my case, the StarTech MDP2DVID unit worked very well and fixed all my issues! Very happy.
Is this product perfect? No of course since I saw in a couple occasion the initialization issue where the colors gets corrupted but again this happens only at starts, and probably is more the result of some bad timing (though one star removed).
However on a daily basis the StarTech MDP2DVID works very well for me and the product looks as a good quality one. Also I have connected the USB power cable to the Surface Pro dock without issues (this relates to people saying they need a separate power supply).