We were looking for a quiet break and didn't realy know what "freestyle" cruising entailed. Although, as I said, we had a great time, we would probably not choose to travel freestyle again. The reason is that there tends to be (understandably) a fair bit of noise with so many young children, and disco music was on full volume by the pool area most of the time. The Epic does provide a pool area restricted to adults but when at sea it was very hard to get a sun bed - and I would say that the shortage of sunbeds is a big drawback on a ship of this size. It was OK during shore days.
Our cabin was 14041 on Deck 14 underneath the public areas and we heard quite a lot of noise which sounded like people moving things around during the middle of the night - but I don't know whether this was from children moving around in adjoining cabins or staff preparing the restaurant above during the night ready for the next day.
If you are going as a family or young couple I would definitely recommend this style of cruising. If you're wanting something a little quitier it might be worth considering other cruise lines.