Pros
In my two decade career, I have been with Paycom for only a little more than a year but I can honestly say that among my many jobs, it's the most secure, the most rewarding and the most fun. Corporations are not always a good fit for my creative personality, but this has proven to be the exception. In previous jobs, one of the worst things was dealing with toxic co-workers. Here they are not tolerated -- if they are hired at all they aren't kept around. In other words a friendly atmosphere of mutual respect is something I can look forward to each and every day. The diversity of workers is surprising for such a red state but something to be proud of 100%. While I came in with enough experience to bypass the entry-level positions, opportunities for advancement still exist for me and that's rare for so few OKC corporations. Training is thorough, ongoing, and covers more topics beyond just stuff we need to know for our jobs. Work-life balance definitely exists and is encouraged. The perks are terrific from $1 health insurance to $4 catered lunches daily.
Kontras
The only real disappointment I had upon joining Paycom is the same more than a year later --- vacation time. There is not enough of it that first year compared to other companies, and if you like to take your vacation days in large chunks the accrual system can work against you depending upon when you start in the year. That changes upon your 1year anniversary, but the accrual system is still there.