I've gone through a few TiBooks, with a dog-eared original 400mhz model followed by an 667mhz as work machines, and later ended up with a free 867mhz. (The slower twin of the 1Ghz.) And honestly... there were things I liked about the design but I really can't say they were good laptops. Their composite construction depends on binding a lot of unlike materials together (IE, sheets of titanium screwed to/wrapped around/bonded to plastic and steel frame pieces) and it only takes one pretty minor impact to ruin the machine. A sure fire way to tell if a Ti has ever been dropped is to open the screen and pick the computer up off a table by the front right corner where the CDROM-drive is; a new out-of-the-box Ti was nice and stiff, but in my experience it was rare to find one more than a year old that doesn't creak and bend semi-alarmingly.

My personal 867Mhz I took home after a user ripped the screen half off after one of the hinges jammed mid-opening. (I guess they liked to do it with a dramatic flourish.) Net cost was still zero since I traded a working LCD screen off another dead Ti to a company that specialized with replacing the Apple hinges with stronger all-steel third party units for a repair. If you're looking to repair yours I'd totally recommend seeing if the third-party units are still available. They don't quite look the same but the peace of mind is worth it; if you don't get it repaired be careful opening and shutting it, that "ripping the screen off" thing wasn't that rare of an occurrence.