Pros
Aerotek will hire out of college and gives you the opportunity to try out positions before becoming full-time. They find the job for you, although most jobs posted for intro lab tech work are through hiring agencies.
Cons
No benefits until you've worked for 7 months, so any company holidays (which differ from Aerotek's) are forced sick days. At your job, you are treated as a temporary employee. I work at DuPont Pioneer and do a majority of the work while higher up employees do minimal work. There is little talk of advancement. I feel as though I'm being taken advantage of to do the most amount of work while getting paid the least. Some temps have been here for 3+ years with only a 50 cent raise. Aerotek itself is completely dissociated from me- my point of contact is unreliable and ignorant of my job responsibilities.