Northside pharmacy is located in the Collegetown area and that is probably the most important feature. If you need medicine - over the counter or prescription - this is a good, convenient choice, especially if you are sick and the weather is bad.
For those with cars, there are other pharmacies in town, including Rite Aid in Triphammer Plaza, but the convenience factor for Northside is big. Another option to consider is for students at Cornell is Gannett. Not only is it also relatively close, but you can bursar the prescriptions so you don't have to pay cash.
If you need something relatively simple and are in a bind, Northside is a good choice. It is very close to Collegetown and easily accessible.