I have beaten Crash Bandicoot. I can now officially, finally, say this. I only used a save state on Slippery Climb, reloading the checkpoint a few times. I feel this is warranted, for I plated the entirety of Crash Warped and most of Crash (from Papu Papu to Cortex) in one day.
I love Crash, but now it's time to move on to other games. I'll probably get the racing Crash games if I get a PS2, which I've been considering doing after Christmas. I'm sure all of this information intrigues you deeply.
I was going to go in-depth about the Herculean trials I went through to finally get the game finished, but I'm not in the state of mind to tell such a tale in a way that would be worthy of reading. I'll just say regardless of how hard Gex is, I won't have nearly as much satisfaction beating it.