I've spent the last year working in a lab and am very grateful for that experience. You get to see the way a lot of different dentists do things. Some are meticulous, some are sloppy. Some prep teeth immaculately, others not so much. Aside from gaining the obvious lab skills, I think its exposed me to a lot of different ways to do dentistry and given me a better idea of whats out there, which I wouldn't have gotten just working for one dentist. Also, the lab I work at hosts CE courses which I get to go to for free and has been amazing. If you can find a lab like this in your area I would highly recommend trying to get hired on there.