Summary: Just for the record, Glenn, a D-Link tech, is an outstanding individual. At midnight, local time, my D-Link stopped working. I had never updated firmware since buying the DIR-825 and there were five updates.
Summary: Second time is a charm for this purchase. The first D-Link DIR-825 was DOA, the wall wart was dead. who would think! This second unit worked great. Both the 2.4 and 5 GHz signal could be found all over the huge conference room we were in.
Summary: My D-Link Dir-655 router was going bad (power connector). I have had it for quite awhile, so I wasn't to upset by its failing. I decided on this Dir-825 after researching it. I could tell the difference as soon as I set it up on my home system.
Summary: This router is hardware limited to a 19dBm signal, while some others using the exact same Atheros chipset are capable of signals near the 30dBm range. Do not waste your money on larger antennas, since they will not offer any benefit with the hardware limiting the signal strength.
Pros: Excellent router once flashed with OpenWRT. I have 3 of these in a WDS setup, giving me a full wifi signal everywhere in my house, as well as my garage and backyard.
Cons: Factory firmware is not good. This may be the reason for so many negative reviews. Factory firmware is flaky, my primary router needed a reboot every so often. OpenWRT and DD-WRT will alleviate any bad taste the factory firmware left behind.