The only reviews I read are Android Central, and the review was generally positive. It's a beast of a high end phone. The difference between the DNA and the Razr line is that the DNA comes SIM unlocked. You can buy it off contract and throw an AT&T SIM card and go. I haven't heard the same for the Razr yet.
The Commandments of Android
1) Open RAM is wasted RAM - Don't use Task Killers
2) Cheap devices are cheap for a reason. Don't expect high end performance.
3) Boot Loop = Wipe.
4) There are no viruses for android.