I've had this access point for a year or so now. Never upgraded firmware on it, the current version is:
PID VID: WAP4410N-E V02
Software Version: 2.0.2.1
I've had it running for a couple of months as an access point in my private environment. Simply put, its performance was stunning. I had installed it in an attic with a simple roof with standard roof tiles above it. I would still have a connection both IN my house (through walls/windows) and about in a radius of an average of 100 meters around the house - and all of that with a simple and rather cheap Acer notebook with a MIMO capable 802.11n adapter.
The highlight was that we have a 100, 200 m high hill at approximately 1km distance to our house where there is a nice place with some benches where you'd often walk up to and sit there and look over the valley. It has pretty much line of sight to our house, and distance is approximately 1km, and I still have a connection up there! Only at 1-5 mbit, but my notebook will join our house WLAN from up there. And that is mind you still with the WAP4410N behind a roof, and with standard antennas.
Since then I switched to a Cisco 1250 as my main access point, only because it has way more configuration options, better logging, and is simply put more flexible and professional. It doesn't completely match the performance of the WAP4410N however. I now mostly have E2000s around the house with dd-wrt firmware installed as wireless clients, as that will offer more performance than internal notebook adapters or internal PCI adapters for the PC. On my main computer I wanted a little more performance though, so recently I switched the WAP4410N as a client. What can I say - the E2000 gave me 3-4 mb/s speeds, the 4410N now gives me at least 5 mb/s, sometimes up to 8mb/s. And perhaps most importantly, doing things over the network has become much more responsive.
That through a window and a roof and about 30 meters distance to the AP, with no direct line of sight. If you use cheap hardware you might not even get a connection in that scenario! Let alone a stable connection and adequate speeds. Anyone who has practical experience with WLAN knows that such speeds through obstacles are very rarely ever reached.
On stability: When I had the 4410N in AP mode, I remember it freezing on me probably once a month or so. The Cisco 1250 does exactly the same. There obviously is no AP at any cost that will not hang up from time to time and need to be restarted. In client mode I have no issues with the 4410N either, hasn't frozen on me so far.
I read these went out of production. I have still seen them selling though at some online vendors. I suggest you pick one up while you still can - the newer Linksys APs with the "Exxxx" names with internal antennas can't hold a candle to this impressive piece of kit!
