When you're working the phones, you're just a number to them. They're a 24/7/365 operations centre and they need a voice on the phone at all times.
The salary is probably fair for someone doing menial admin/grunt work, and the benefits are nice. There's a reason the benefits are good, however, because the job itself is not good or fulfilling whatsoever, and they need to keep as many warm bodies answering calls as possible.
It's impossible to get into a routine because your schedule changes every week. You could be working a reasonable 1pm-9pm one week, then 7am-3pm the next. Also, since their week technically starts on Saturday, you're at risk to work a 7am-3pm Saturday shift less than 12 hours after finishing at 9pm Friday.
There's a high turnover rate and almost no opportunities to move up. If you do move up, you're only moving up within the operations centre so you'll still always be on the phone. If you're not someone who can stare at a screen and talk on the phone for 8 hours, look elsewhere.