It's not a question worth asking. Good for what anyway? If you're making art for profit then it's good enough if you're selling it. Otherwise, what does it matter if anyone but you and/or the folks you specifically made it for think about it?

A better question is surely "what will I do differently next time?" Good or bad, nobody will consider their last bit of art to be perfect.

I didn't really follow the answer in the article. I couldn't tell if it was smug self-consolation or if I lack some kind of meta-self-awareness that makes people write so much drivel about showing art in public.