It wasn't so bad for me. I suppose I wound up working an average of about 9 hours a day, 5 hours a week. But a lot of that time was in "troll sessions" with friends, and it was fun. I also really enjoyed being around smart and motivated people.

All in all, it was a very positive experience for me, and has paid off handsomely over the years. (Not the degree, I don't give a crap about that, but what I learned. A friend summed it up succinctly with "it's not about learning facts, it's about learning how to think." Learning engineering and science rewires your brain.)