This was our second in Queen Victoria. But the first since the 2017 alterations. Our reason was partly because the first was so good - not always the wisest reason - and the second because we wanted to get away.
Embarkation at Mayflower Terminal, Southampton was flawless. No filling of health forms, no waiting on not so comfortable seats, straight to a check-in desk and on to the ship. I do not know why it was so quick, perhaps because we were latish for boarding. Be that as it may, by far the most efficient and fast.
Our cabin on deck 4, with balcony was quite adequate, albeit the shower/toilet cubicle could hardly have been much smaller - significantly less than on our Brittany Ferry just a few hours before. But adequate overall, comfortable bed and well looked after by our steward whom, apart from initial contact, we never saw again. Deck 4 is I think at the lower end of cost structure, but the balconies are larger. Also closer to the theater and Britannia Restaurant levels. But a longish trek for the Lido self service, unless you take the lift.
This was a Cunard excursion. It involved walking with a guide across the lava fields for some three hours and visiting one of the 300 year old craters. A small group of 8. Organized by a local company and I would guess that you could arrange this direct but for us it was highly enjoyable and good value