“Good enough” is fine at the finish. Saying it halfway through is just quitting politely.

There is a real point where more polishing stops adding anything, and recognizing it is a genuine skill. The same phrase used halfway through is doing something completely different, which is handing you a respectable way to stop while the work is unfinished. It sounds mature, and that is exactly why it slips past. Timing decides whether it is judgment or an exit.

Ask whether you are near the end or just tired. If it is tiredness, take a break instead of a verdict, and decide tomorrow with clearer eyes.