Would say this place isn't ideal or meant to be for a single night stay.

Its not a traditional hotel and the Marriott website should make this better clear.
E.g. there is dinner at a set time and you cannot choose from a menu. During dinner it is not allowed to speak. They call it "Silent Dinner: Dinner is served observing silence."
This can be a wonderful and unique experience; for others quite a shock; and most-likely not for the average Marriott client who is looking for a lounge, upgrades and free wifi (not even a phone signal at this hotel).

Better check their official website: Vacanze in Monastero, Vacanze Spirituali | Eremito