Diamond has saved me money... On top of the Balcony discount ($225 per cabin), the drink vouchers have stopped me buying the DBP for me and RP for DW. That is a savings of $800 per cruise. DW will only use two vouchers on port days and three vouchers on sea days so that means that I have 5 or 6 vouchers at my disposal. The coffee machine in the Crown Lounge means that I don't have buy or use a voucher for my morning cappuccino. I'll buy a few drinks over the course of the week when I have run out but the cost of those is discounted sometimes by purchasing the drink of the day or using the coupons for beer and cider. So while it is not a total of $800 saving off the drinks it is still very very substantial.
People often poo poo the photo benefit but I have enjoyed getting a formal picture on every cruise I have ever been on. In the past I had to pay for them. Now we get two for free.
Another benefit that has value is the $10 off the laundry bag. I'm almost always going to use this service. I have no desire to wash underwear in a sink and hang them to dry. I'm on vacation for god's sake and $25 to have clean underwear and t-shirts without me putting any effort in is money well spent. I'll be diamond+ soon and it'll be free. Right now $10 that stays in my pocket is good. Later on $35 staying in my pocket will be even better.
I'm not sure if Twangster was being sarcastic or just trying to make a joke or was sincere but he is a great poster and would have meant no ill will.