I don't know about all of the them but I bought a bunch of them.  I also have some from 2013 and 2014 that are very good. They rival the vintage ones. I smoke a lot of top end Cuban regular production...Lusitania, CoRo, Esplendidos, HdM Double Corona, Sig IV and VI, etc and I still find that the ERDM CS is the perfect morning cigar with my coffee.  I have read here that the latest production runs of the ERDM CS weren't very good and then I read that CA magazine recently gave the CS high marks in it's Robusto ratings.  I put much more faith in what the guys here say than what that advertisement driven rag puts out.  Haven't not smoked any younger than 2014 I can't speak to their quality.  A good ERDM CS is buttery and a bit nutty.  Reminds me of a Payday candy bar.  On the mild end of Medium body I find it to be a smoke that should be enjoyed slowly and with a bit of contemplation as there is a lot more complexity there than it initially shows.  When right it is a beautiful smoke.  As I told 
@ChefBoyRG54 once upon a time it reminds me of that little brunette librarian with the horn rimmed glasses with her hair done up in a bun.  Overlooked and ignored until she puts in her contacts, lets down her hair and puts on her tight fitting jeans.