It works for me!!
My nephew was here over the 4th. He loves gagets too and was going on about the Roomba he and his wife just bought...so next thing I know, the partner here orders from Amazon the Roomba 4230 Remote Scheduler, there is currently a $25.00 discount.
Well, the darn thing actually works!! The whole house is tile, with a roving Doberman that sheds hair like crazy, plus all our Las Vegas dust. First time through the dust pan did fill up rather quickly, but after that we just empty it right after it gets done cleaning. I am surprised at the amount of very fine dust it picks up. With the Doberman, he's got short hair, so no tangles of hair around the brushes.
The scheduler come with two of the virtual walls and the remote. The remote allows you to manually drive the Roomba and set prescheduled cleaning times. So far it has fallen off into the sunken living room a couple of times, but it is learning where the step are.
Have I retired the poor old G4 Kirby just yet? No, still needed for dusting and some areas the Roomba can't get to.