There IS DD-WRT. Those reviews on Amazon are before DD-WRT was ported earlier this year. Reviews that say there is no DD-WRT are from 2013 or very early 2014. DD-WRT can now be put on this router. See other comments here about that. I just wanted to clear up why some reviews say there is and some say there isn’t.
One of the product pictures shows the back of the unit, it appears there is a switch marked “Bridge”
In for 2.