Is 24MBPS fast?

So basically i'm getting AT&T's Max Turbo plan that's 66$ a month for just internet and has downstream of 24MBPS. I need to know a couple things.

1. Is it fast enough to normally pull host

2. Is it going to be fast enough to run 2 computers and 2 Xbox's

3. Will my PING most likely be below 15?

Please help i could appreciate it!

I don't like AT&Ts Internet. They are really slow. Well in some areas. If you have FIOS it Xfinity get either one. I have FIOS and it is amazing. I got the best Internet plan and it works swell. That's just my opinion.

I have 50 or 55 for 70 a month but I'm canadian. I usually get 5 Up, 53 down, and a 9 ms ping.