Pros
They like to pull full-time employees from the pool of seasonal employees. If you are willing to REALLY kiss up to supervisors and management, they will likely pull you back if they need a full-timer. Once you get in the door as a full-time employee, the place is great to work for.
Cons
I am writing this so I can access other reviews on Glassdoor, but this was my experience as a seasonal Costco employee. A seasonal position might make you dream of being hit by a car while pushing carts in the parking lot, so you can #1 go home, and #2 get rich off the L&I claim. Seasonal employees are treated like grunts. They do everything from go-backs, assisting the clothing department, assisting the bakery & food court, pushing carts, filling gas (in states where people can't fill their own), assisting cashiers, and worst of all, being mistreated by customers. Supervisors were rude and arrogant at the Albany, OR store. One supervisor that was still training and not officially a supervisor yet, asked how I was doing. I didn't act dreadful or or like I hated my job, but I was honest and used the word "tired," as I was a full-time college student taking more credits than the university-allowed maximum. The trainee said to me, "that isn't something you should say to your supervisor." A lot of Costco customers have a chip on their shoulder because they pay for membership to shop there. Also, the number of customers who don't read signs on the items like "TWO packs of muffins for 'x' price," means they only grab one pack of muffins. And guess who has to sprint to the back and grab them another one. If you don't walk or run fast enough, management will tell you to have a "higher sense of urgency" in your performance review. Costco is also very strict on clocking in and out. They do not want to pay a penny of overtime, or give any extra hours. Seasonal employees will have 30 hours one week, then four hours the next week. If they are understaffed for the day, they will still make you go home after a 4hr shift because they don't want to pay you for a lunch break. They will also send you out to push carts and completely forget about you, then reprimand you for not clocking out on time. For reference, the supervisors have clipboards of everyone working that day and what shift they're on, and their job is to tell employees where to go and when. FINALLY, they are supposed to provide exit interviews and final reviews when the seasonal employees get cut, and the Albany, OR store did not do that. They are the farthest store from their assigned corporate office, so they cut corners and treat seasonal employees like trash. If you want your work to speak for itself and you do not kiss up to management, you will not be brought back.