The original “Titanium” PowerBook G4 was my first Mac. At least, the first one I bought with my own money. I absolutely loved mine!
Yes, it had some issues with the physical hardware: parts of the metal case were quite brittle and could crack, issues with the screen hinges, etc. But no issues with the electronics inside, that I can recall.
It’s design was revolutionary for the time and set the direction for all future Mac laptops: the latest MacBooks today still owe a lot to that original PowerBook G4’s sleek metal shell!