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Test 24 stations / 24 streams 2Mbit/s
Test 8 stations / 8 streams 10Mbit/s
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Half the stations, results were a little better: ~32Mbit/s (The screenshot doesn't tell the correct measurements)
Conclusions
While Airmax is a good product, with a lot of pros, like low latency and jitter on each customer, higher aggregated throughput compared to the other 802.11 like technologies, it is far behind the Cambium developed solution. It costs far less, which makes Ubiquiti Airmax the best solution for non crowded areas and low budget WISPs. For crowded areas, we might consider to purchase the Cambium PMP450. Or we would love to stick with Ubiquiti if they develop their custom protocol.
Special Thanks
To be fair, i need to thank Mikrotik for his beautiful devices and OS and his Traffic Generator tool. Maybe if i had more time, i could bypass the limit of 16 streams to accomplish the tests.
Thanks to Progetto8, to Marco, Massimo, Vania and Francesco, who helped me building up the tests and providing the needed devices.