How Accurate is this map of the Roman Empire in 211AD?

by Claidheamh_Righ

How Accurate is this map linked below? Are the borders/roads/locations accurate? Is there anything misleading like Imperial control actually being quite weak in some area?

Original post in /r/MapPorn

The Map in question.

Web page for the map that explains it a bit and lists sources.

CommodoreCoCo

Just a heads up that this map was already asked about this a few minutes earlier, so discussion might also occur here