Inconsistent Recognition, No Career Path To Speak Of - there is no career path. You can become a team lead, which involves no extra pay, no extra authority and a lot of extra work, but there's no real advancement beyond that unless someone decides to make you a task or project lead (which happens infrequently). Recognition for achievements is scattershot. If you know how to finesse an annual job review and aren't lazy, you'll make a decent raise every year, but aside from that annual review, feedback on the job is pretty much nonexistent. Counseling is nonexistent. Most people outside of senior management seem to have no idea how to help you with your career. You get noticed if you screw up, you'll receive little in the way of guidance on improving performance from anyone above the team lead level and you'll only advance in that company if you leave for another job then come back later. Basically, you're paid well for your work, they'll try to find you a new job if your project ends, but it isn't something that will likely lead to a promotion of any consequence.
Performance perks nonexistent - you won't get a bonus unless you're a task lead, regardless of how well you do with the job. The salary, again, is fairly generous so it's a minor gripe.
Communication - the company tends to communicate everything via frequent e-mails and they often bury essential information on day-to-day-operations in their newsletter under a dozen stories of marginal consequence to the employees. This can be a problem, particularly when the essential news involves pay issues.
Retirement - there isn't much of a retirement plan. The stock option is not particularly generous. You're better off saving your money and finding a good financial advisor on your own.