I work as a waitress during the school year, which helps with expenses (I take care of food, books and spending money, and am making myself responsible for rent, should an RA position not be in the cards for me). I find it helps, because it makes me balance my time a lot more. I’ve become a lot more diligent about my school work and more careful about how I spend time and money. It also helps, so that I can get internships over the summer.
I think it depends on the situation. Work experience is important but so are good grades. And that’s what summers are for. For me, I have to work, it’s a financial necessity and I’m trying to take more control of my own life. For others it may be different.
It’s funny, the year I did not work, my grades plummeted. This year, I work and I ended up getting better grades. But I think it’s because I do need to do something with my time. And I’m not premed anymore so that could be a factor.