Wishing you luck I've had the 5 GHz model since January. It's in a redwood tree and I've enjoyed 5.65 Mbps almost consistently ever since. It does have moments of problems. Every few weeks, the wired connections disconnect for 5 minutes or so. I don't even call anymore, just wait it out. Also, we had a lot of troubles with WiFi disconnects (wired remains working, 2nd router same problem). Long story, but weeks of reading, I tried a test. I knocked my N router's wireless speed mode down from 300 Mbps to 130 Mbps. That took care of most of my problems and I see no ill effects in my ip cameras or streaming Netflix. Now, I get wireless disconnects about once a week? I only need to unplug the router for 15 seconds and wifi kicks back working.
I'd love to hear an update for your equipment. DP is a love/hate company. Love them when it's working well. If it wasn't for them, we'd be on satellite...