What should I do??

What I think you should keep in mind, and my husband and I tell our son who is a Junior Engineering student, is that jobs are not like they used to be. You used to go into a job and stay there forever. It just doesn't work that way anymore in today's workplace. People are constantly moving and companies are also not loyal like they used to be....they lay off! So, you DO need to go into it with the attitude of what is best for you...yes, do a good job, but if you want or need to leave, that is just how today's workplace atmosphere is. I don't think it is smart to feel too entrenched in one place anymore, that is just my 2 cents. I wish you all the best whatever you decide...this does seem like a great opportunity!