Crockpot for the 9-5 worker; worth it?

I’m thinking about getting a Crockpot, so I can throw everything in there before I leave for work and have it be ready by the time I get home at 6pm. Unfortunately, most of the recipes I’ve seen require only 3–4 hours in the pot…and I really don’t want to make a special trip home during lunch to start dinner. Maybe it’s because I’m vegetarian, so veggies don’t take as long to cook as the meat recipes?

Do you think these recipes be ruined if I leave them in the cooker for longer than the prescribed time?