I didn't know they had that. My ChannelMaster has a nice EPG, goes out about 10 hours and can click on each program for details; can also scroll the EPG channel by channel (vs. having to tune to a channel then hit EPG).
One of my Zenith-clone Artec models has a half-dayish EPG but I can't remember if the other model has it. I think it only detailed the now/next stuff though.
Those DTV Pals are supposed to be the ones to get for EPG, multi-day (maybe a week) and detailed. I think I've heard they can be [EPG] buggy though, take awhile to update which I think required leaving powered up or at least plugged in (I powerstrip everything to turn off those vampires GW dislikes).
Then there's the Apex DT-502 with a multi-day EPG. Now I've heard to avoid Apex, esp the 250 models (and I wouldn't waste money on their TVs, DVD players, etc.) but a reliable poster here said that one model is pretty decent. This one's feature-rich with stuff like s-video.
The ultimate box 'appears' to be a TRT model, feature-rich/s-video like the Apex plus maybe more (cable tuner?) and week-long EPG. Mysterious box due to lack of marketing, most of us didn't even know it existed until the CECB program had just ended when like one poster here bought one. It looks great on paper and he liked it. He had to buy it direct from TRT too and it wasn't cheap, sort of CM full retail price. Looks built like a CM too, big metal box, amp/antenna design company look, etc.
I believe there is/was a thread or two here dedicated to EPG topics.