During my time at UTSD in Houston, I lived in a suburb on the south side of town because Idon't like living in the city. My commute on a perfect day was around 25 mnutes, on an average day 40-45 min and an a bad day 60-75 min each way. Would I rather have not commuted so I had extra time? Yes, but does that mean I would have changed things if I had the chance to do it all over again? No! Even though the commute took away from time studying, time in the lab, etc., I enjoyed where I lived. It was nice to escape the city. Did my grades suffer? No! I didn't do as well in my first semester as I know I could have, but in no way was that due to the commuting. That was due to not having been in school for 9 years and not knowing how to study. After that, i did extremely well until I determined I didn't want to specialize. At that point I just relaxed and didn't worry about being near the top of the class and competing with those who wanted to specialize.
So, my point is commuting isn't necessarily fun, but if you have circumstances that prevent you from living near the school or like my case where you loved where you lived then commuting is still possible while doing well in school. Just make sure that is what you want to do!