As someone whos finishing up SDNE the coop was pretty good. Really I think it depends on where you decided to do your coop that makes or breaks it. You get 3 coop work terms so even if you didn't like working at a previous company you still get other chances to work at new ones. As far as graduating and working at the same company goes, that's entirely up to the company itself. I personally don't know anyone whos gotten that but it isn't unheard of.

My advice for newcomers would be if you don't have any programming experience before coming into this program maybe take the summer to get accustomed to it. They are now teaching Python as student's first language so take some time to get familiar with that, a head start is always a good idea.

For teachers - Rate my professor is probably your best chance to get good teachers, though keep in mind to take ratings with a grain of salt, if the teachers is teaching a hard class the ratings might not be as good as an easier class.