Pros
Fun, laid-back culture, opportunities to make great money, flexible schedule, cool people. An inbound call center is a breeze compared to other sales jobs. I worked at Clearlink for about 18 months while taking on a full-time load at BYU, and generally didn't have issues getting time off when I needed it. In my prime, I was making over $30 an hour while working around 20 hours a week. Clearlink prides itself in its fun, youthful culture; free food, games, and music were the norm on the sales floor. Health care and tuition reimbursement are nice too.
Cons
If you can't sell and don't care to improve, you're gonna have a bad time. Management is generally helpful and will work with you, but at the end of the day it's up to you. If you don't perform to par with management's metrics for a number of weeks in a row, you're gone. I saw many, many employees come and go in the year-and-a-half I worked here. It can be draining to take calls for 8 hours straight, 5 days a week. Working nights and weekends is mandatory for most new hires. I've also been told that it's become more bureaucratic since I left, with less flexible hours and a more uptight environment.