We've sailed on M-, S-, and E-class ships. FWIW, we much prefer the S-class ships. I loved some of the new things about Apex in August, but many of the venues were extremely, uncomfortably crowded much of the time. So much so that we were unable to see shows in the Club, attend events in Eden, watch the band in the Martini Bar area, and even just sit and have a nice drink in the Retreat Lounge. I haven't watched the webinar yet, but it would have been interesting to hear if their new ships will address some of the overcrowding.