There is no real competitor at the moment when dealing with heatmapping a wireless network in a site survey. Alternatives like Air Magnet are nowhere near for now because of the stability of the program.
You need to know and understand Ekahau if you are a Wireless profesional even if you don't use it. Review collected by and hosted on G2.com.
Memory utilization in version 10 increased in a big way, so when I only need a site survey I prefer to stay at version 9 since there is not a really big difference, my computer can run that without issues but running that in a surface pro is not as easy as before and some times not doable at all. Because of that, we need to have version 9 and version 10 at our PCs.
You can't use Ekahau Nics in MacOSX only the sidekick and bringing a sidekick is not always the best idea, so you need another PC with windows or install Windows natively if you plan to use Ekahay survey functions. Review collected by and hosted on G2.com.