I worked at Boardwalk as a Resident CSR and I did find the on-call to be a bit overwhelming at times, however it is only 4 days a week so you do get a break. It just seems unnecessary to be answering calls about availability when there's a 24 hour call centre just for that reason.
HOWEVER- in exchange for the on-call time, you get a dirt cheap apartment (usually a nice, renovated one) and the pay is really, really reasonable given what other places pay. The health benefits are also really good, and there are lots of company dinners and events that are really fun.
Pay, health benefits, cheap apartment, company outings, company does lots for charities and community events
On-call hours, upper management can be a little out of touch with what is realistic to ask of staff