First of all what type of devices are you implementing. QoS config is different based on device model.
The advice is to make sure that your config is aligned end to end (tag, queueing,..)
Make sure also when traffic pass some equipments like firewalls, to trust the dscp.
it will be about 350 android devices that will be connecting to our WAPs for voice and messaging.
Prob is that we didn't really profile anything yet as far as understanding if they will even saturate our links or not.
We have all Gig connections on access layer and 10 gig uplinks to L3 distr.