They really have been just that, Paddy, very straightforward. And, each computer comes with a 30 day guarantee as well.
One caveat is that they generally don't come with system discs from these folks, but a lot of iBooks on e-Bay don't either. But then again, one can find the occasional deal on eBay with a lot of good software preloaded from some Power Sellers.
If considering buying from Macofalltrades, I would contact them about the 14" iBooks they are selling though, before buying, as the description has them without a Firewire port, which I'm pretty sure isn't correct. As far as I know, all the 14" iBook 1.42 Ghz. G4's come with that standard.
Chris K