Pros
Timely with reimbursements, better than actual place where they were subtracting me timely payments
Cons
There was disconnect between Kelly Services and who was actually contracting me (NIH). Their yearly evaluations had no basis on day-to-day reality, and they played small role in my tasks or task management When there was government shutdown for 2 weeks, contractors never got backpay, only actual government employee Mediocre benefits -- health plan was awful, though this was before current regulations so perhaps they're better coverage now, though most likely meagerly subsidized Finally, there was very little career opportunity. 1 out of the 20 or so contractors that passed through in my 2 years there got promoted, and that was after he worked as contractor for 5+ years. Not great return on time investment. Very little investment in career growth. Took what I could from the NIH where I was contracting, but no classes were reimbursed, no educational conferences, etc.