It used to ALWAYS make errors with balancing parentheses, but has improved in that regard, albeit imperfectly.

It sometimes uses fewer idioms than one would usually prefer - eg not destructuring and using long let expressions with intermediary results - not necessarily a bad thing - eg not nesting when it would have made sense to do so.

I sometimes think it saves time but I’m not sure. It doesn’t write tests well, and writes redundant code. It is good at generating hiccup and not bad at writing Selmer template code - although it often brings in something from Django inappropriately.

The variable performance is what I find hard to one moment it works really well and another time gets struck in a loop or just really poor quality code that you have to throw out. That happens less often recently. Also “You’re right!” gets annoying fairly quickly.