I once stayed in a 2BR penthouse suite, the most opulent room I ever have and ever will stay in. It was during the recession and I got a free room through a promo. It was supposed to be a 1BR but they were out of those so we got a 2BR.
The President of the United States happened to be staying at the
Bellagio the same night we were there. Fortunately he was in the other tower so we didn't have to pass through the security screening to go up to our room.
Anyways: It's everything you would expect and hope for in a five star suite, except no butler. It was bigger than our house. Salon with bar, couch, and dining table, and fabulous in every way. Most noticeably, the room has five bathrooms: Two in each bedroom and a powder room in the living room for your guests. Also we kept all of the lotions, shampoos, loofas, etc and came away with a full bucket of them.
I recommend the room for anyone with a large entourage, such as royal families with indentured servants. It would also be good if you plan to host a party of 20 or so invited guests and you are able to get them through security.
For my wife and myself, who are pretty no-frills do-it-yourself kinds of people and normally enthusiastically stay at 3-star off-strip hotels or Holiday Inn Expresses, it felt completely ridiculous. We invited everyone we knew to join us via a facebook post , but nobody was able to make the trip to Vegas on a Wednesday. So we used all 5 bathrooms and messed up the sheets in both beds. Also, we both had the flu so we spent most of the time in bed. I give it 5 stars as a place to convalesce.
https://www.bellagio.com/en/hotel/penthouse-suite.html