I heard nothing at all about them, so, not so great. No matter what there are always going to be those who attack Elon, either for doing something or not doing enough. If he said nothing they'd be screaming about how he dropped the ball, couldn't come through, etc. I have no problem with him tooting his companies' horns, he just needs to learn how to deal with attacks in a better manner. Posting a video of the sub making it through the cave would have been the proper response to this specific attack, or just saying "we did the best we could with the data we were given".