In reply to Kenny_McCormic:
I work for them. Aside from what DoctorBlade already told you about going straight to a local office and dealing with them, what you need to know is that they will always try to sell you the current promotion, you can turn it down if you want, but hey, why not take that discount for a few months?
What you need to do with them is confirm what the price will be after the promotion. A lot and I mean A LOT of customers do not know what the after promotion cost is going to be, generally due to the fact that they forgot. The sales rep on the phone is supposed to repeat that to you before you get off the phone.
Some of the promotions come with basic TV with a cable box. If that's the case, Take it, it's like getting discount internet with free TV. If you don't want TV, when the tech comes to install, just tell him you don't want to hook the cable box, you just wanted the discounted internet. They'll understand. When the promo is over, take the cable box back to the office (or call to have a tech pick it up) and have them remove TV services from your account. A little bit of a hassle, but I see people do it all the time to get the discounts. Like I said before, if you really don't want or care about the discounts, then just tell them you want the straight deal, you don't want the promotion.
If you want wireless, Make sure to tell them that, don't assume you will get it if you don't ask, the company still offers non-wireless internet, so if you don't ask, they won't give you wireless.
If you opt for self install, just realize that if your apartment isn't hooked up outside and you can't get it active, they will charge you install fees to have a tech come out to get you hooked up and running, so it may be wise just to have a tech come out to install you in the first place.
Another thing is that people try to avoid paying the $7.00 a month rental fee for the modem by buying their own $60-$80 modem. That's fine and all, but just realize that if that modem craps out for any reason, you have to buy another one. If you rent one from Comcast and it dies, they replace it with another.
Oh and going to the local office is a better idea than the phone to deal with anything. Just make sure you go either when they open or after lunch before 4:00. That's usually peak hours for walk in service. The website sucks for setting up any form of service.