Pros
Manpower is a great introduction into the staffing industry. They are still among the top agencies out there and are very well known. Manpower has plenty of great additional benefits to service the customer; testing, online classes, electronic timecards, etc. Decent benefits with matching 401k, discounts on stock purchases, and opportunity for quarterly bonuses.
Cons
Manpower is now faced with plenty of competition. Normally, a business will shop around, get quotes and take the cheapest one. Also, most businesses have sent production overseas which makes getting new business difficult, especially in the Silicon Valley. There is business to be had but most companies will hire the employee on permanent after three months - so plan to take one step forward, two back quite often. The technology used at the branch offices is way out of date. Branch Managers should all have blackberrys or another device to check email while out in the field. I spent about 70 % doing sales calls and 30% keeping up on everything else involved in the branch.