In the Engineering College, you pretty much have every semester for all four years planned out for you, so there really isn't much room to pick and choose what you want. It's very direct--you get GE/core classes out of the way freshman year and by sophomore year you're already getting into concentration elective. Classes are hard and hard to do well in--it's definitely not a school were slacking off is possible, if you want decent grades. The workload is manageable if you don't procrastinate. The professors are great and incredibly knowledgeable in their respective fields. And Tufts is probably one of the best colleges to go on a study abroad program. It's a pretty competitive school, where all the students are striving to do their best, but not cutthroat, where students are trying to undermine each other to reach their academic goals.
Quality of Life
Depending on where you're put in, housing is pretty decent. The cost of living is high, but the dorms are good enough that you don't complain. The campus itself is pretty safe, even late at night, and during the day, there are a ton of places you could explore that are right off campus. It's close enough to the big city if you're ever interested in going, but far enough that you have a nice buffer between hectic, crowded city life. As for facilities, the gym definitely needs work, but the library, music center, and campus center are all pretty nice. Tufts is a really happy school; you'd be hard-pressed to find people who are genuinely unhappy here.