The G4 Mac Cube was designed without a cooling fan and worked fine without them.
There were some problems with heat on some first edition laptops in both the G3 and G4 but it wasn't generally related to any crashing... just hot laps. i did not experience this eitherprimarily because I didn't purchase any of those first edition laptops.
I’ve not experienced any problems with the imac that weren’t of my own doing. I am still learning how to use my mac, but I absolutely love turning it on and it’s ready to go. I also love not having to wait for all the Windows updates and virus scans every day.
And of course now dh has purchased us iPhones, so here I go again, trying to learn how to use it. It’s been pretty simple, even for me. I just want to learn how to make my own ringtones on Garage Band or find somewhere that’s free.
I’ve rarely met a person who has not loved the mac once they vowed to give it a try.