For the most part, the school's wireless network is pretty reliable; however, sometimes it has problems (like any other school's network). There are two 24-hour computer labs, which are never really crowded except during midterms and finals weeks. Every student should bring a computer to school with them, if possible. Laptops are the best idea.
Computer services should be your last resort. They know computers more than the average person, but they can also really mess up your computer. You could bring a computer to them to remove a virus, and then realize when you get the computer home that they had taken off part of their own program (the one the school has you put on to get into the network).