While my wife and are relatively new to the cruise world (7 cruises) but it doesn't take a brain surgeon's expertise to know when a cruise is much less than it should be.
If you like hard working, pleasant crew members the EotS is the ship for you. If you like organized, smooth embarkation and debarkation the EotS is for you. If you like great public areas that are interesting, well maintained and accommodating the EotS is for you.
If you think country club casual clothes for dinner should include 1 1/2" wide suspenders over an "Old Guys Rule" T shirt and 40"+ jeans the EotS is the ship for you. If your idea of formal night is a polo shirt and some wash and wear khakis the EotS is for you. If you like wonderful dinner menus that describe a meal that you will never get the EotS is for you. If you like room carpeting that has coffee stains from the last decade the EotS is for you. If your idea of bathroom toiletries is a bar of soap and one of those plastic push button, all purpose lotions in the shower the EotS is for you. If you like to mix with fellow passengers who equate quantity of food with quality the EotS is for you.
While we booked this trip on a last minute whim the fact remains that all of the above would be in place whether we were on the ship or not. The clear message is that for a few hundred dollars more you can get a cruise that will meet all of your expectations and more. I cannot recommend the RCI Explorer of the Seas to anyone.