Will have an extremely heavy work load, and will be tasked with working with technologies you have never touched which can prove difficult to maintain the level of work you otherwise would be capable of. The plus side is you will get to learn new technologies.
Second con is the service desk management, they watch numbers like a hawk and is all they care about. You will be spending a considerable amount of time reviewing your ticket notes and trying to cover yourself to prevent management from complaining about your work, otherwise you will work 50+ hours a week, working hard but get dinged for missing a note in the ticket you worked or something minor along those lines.