I can say unequivocally entering YC is one of the best decisions I have ever made both personally and for my business.
I'll let others debate the monetary economics of YC and just say that the YC network effect is the most under-rated aspect of YC. Both the W14 batch mates and the YC alums from past batches have been amazing in terms giving us strategic and tactical advices. This aspect of YC simply can not be ignored.