Wi-Fi Analyzer

[bryan at shout.net (Bryan Holloway)]

Curious if the community has any recommendations and/or positive 
experiences to share for a handheld Wi-Fi (802.11a/b/g/n/ac) analyzer.

Software/laptop-based solutions can be unwieldy in certain environments. 
However, given rave reviews, I'm open to the idea as long as it's 
Mac-compatible.

Should be able to show detailed spectra, help locate sources of 
interference, have mapping capabilities, etc.

Thanks!