Fantastic diagnostic tool!

Very powerful. Uploaded a diagram of our office space that came with our lease and walked around the office. Instantly revealed the deadspots in our wifi coverage and the 50 other access points coming from the other tenants and nearby buildings. 2.4 and 5 Mhz detected and every access point was listed with its SSID, signal strength and channel in a nice report. Tweaking the sensitivity after taking the readings allows you to customize the contrast of the image. Awesome diagnostic tool. Wish Apple would allow products like this (and wifi stumbler apps) for the iPhone and iPad again.

NB in DC about NetSpot: WiFi Analyzer