Maximum on line is only 15. Speed is fairly constant, only draw back is the delay to satellite so no good for on line gaming. I don't do that thing so it's alright.
I have this IP address and 4 others. 2 laptops ( 1 Ibook and 1 powerbook) are configured to separate IP addresses. The airport cards pick up the signal with no need for either a lan or wan network. Just downloaded a 500Mb update for the powerbook. 40 minutes for that.