I work for TELUS and i actually have this PVR system. its pretty friggen awesome I am able to record 2 HD streams and watch another SD stream at the same time or watch one HD and record another seperate channel its badass. The system uses one PVR receiver that controls everything, if you go onto another tv in the house that has a basic TELUS receiver you can access any of the recordings on the PVR and even start off from where you left on another TV. You would still need to have a HD receiver on the other TV if you wanted to watch in HD on the other TV but i believe with a contract there are no rental fees for the additional box, im not 100% on the billing for the STB.
Im not sure of the actual space that is included in memory size. but its 115 hours of HD prog or 295 of SD.
http://www.telus.com/content/tv/iptv/system/index.jsp
all in all I am very happy with it, I also enjoy how quick it changes the channels and how the SD has been improved. hopefully this helps.