what’s the ideal bandwidth I should permit for each user, note that my internet service is dedicated 512/256 and I have around 30 users in total, around 10 comes online at one time. how can I give them the Max (Ideal) bandwidth 
Same situation is mine… I got 1M/256K… Using this:
http://www.mikrotik.com/testdocs/ros/2.9/root/queue_content.php#6.54.6.3