Maybe it would be good to SPECIFY "good works."
For example, good works might be speaking in tongues, healing, performing miracles.
For some, good works is going to church, reading the Bible, praying, etc.
For other people, good works might be visiting the sick and dying, comforting the lonely, sharing a word of encouragement here and there.
Still others might consider good works all of the things they DON'T do, such as swear, lie, kill, get irate..
What works are being talked about here?
Also, if it is Christ that does the works in us, then it's true that we cannot judge people by their works, because that's the Lord's job.
The slippery slope I see with "saved by grace, not works" folks is that they tend not to do ANY works because they're afraid they might start feeling "justified by their works" if they do them!
Just a couple of thoughts,
(the other) Brian