Is 12 mbps fast enough for 4-5 users to connect to and use?

Answer 1

Probably, though it depends what the five people are attempting to do on the 'net. Under normal use not all five people would be using the 'net at once, so active users get a bigger share of the pool. Browsing web sites and sending a few e-mails will soak up very little of the 12mb/s. However, if all five users are all streaming different HD movies at the same time there might be a bit of buffering. Under normal usage, 12mb/s is plenty of bandwidth for four or five users.