As long as it's singleplayer I don't mind (For others)
Personally i don't like cheating on the first playthrough of a game (unless I find it boring/don't like it) I think it's killing the immersion. After that first playthrough I don't mind, because I know more the game and I already had the first impression and the orginial sensations which I won't have anymore.
TL;DR I don't mind If i already finished the game