I did it in 2018 and it was wonderful. It wasn't incredibly expensive (about the cost of a roundtrip flight, for the one way trip). Food was great, we had the good fortune of being on a Blue Note Jazz special so the music was incredible. Not sure I ever want to do it again - felt more like one of those one-and-done lifetime experiences - but I have nothing but good things to say about it.
Also, unlike cruise ships, the QMII is a bona fide ocean liner, capable of crossing the N. Atlantic even in winter storms.
It’s a Carnival cruise. If you like going on cruises you’ll probably like it. I don’t like cruising - and we went with our four year old, and there is literally nothing for kids to do on board, (there’s a “kids club” but it was closed for the duration) and they aren’t allowed into the dining room, so we ended up living off the crappy buffet and the very limited room service menu.
Our stateroom also hadn’t been cleaned when we boarded, and they had problems with the black water system so several decks just stank of shit. Our balcony had a persistent leak above it, so we couldn’t use that either.
The tickets themselves weren’t that much, but then it’s about €1,000 for internet access, and they nickel and dime you on absolutely everything, while not allowing you to have the things you already paid for - our bill on departure was about €4,000.
Oh, and at disembarkation in Southampton they destroyed two of our suitcases, and told us to go cry harder - and then it’s a three hour wait for a taxi.
Their main target markets appear to be mennonites and uptight assholes.