It's been a while since I've been there, but the basic idea is pretty much the same for most call centers.
From what I remember, some of which may be inaccurate now.
It was a pretty calm environment for training, the training itself was lightweight and the instructor of the classroom had a bit less than stellar control over the students, letting chaos happen often.
The actual call floor was more of a learn as you go situation, once you got used to it you're golden, but before then it's a steep learning curve.
The other employees are really friendly for the most part, and accommodating.
It's Comcast, apply only if you don't have much of a soul and are okay with borderline lying and scamming customers or want real sales experience for your resume with a big name on it.
Friendly workplace, comissions from sales
Cutthroat sales, sales quotas, borderline lying / scamming, not so great training