Viking Star is wonderful, we couldn’t fault the service or the ship and many others have written of its merits so I won’t repeat them here save to say we had the most wonderful 2 weeks and enjoyed every second of it. I would highly recommend trying it for yourselves.
The cheapest cabins were sold out so we had the next level up which unless you have to pick them (because others are sold out) was a total waste of money. The extras you get are simply not worth it. A bag of crisps, 2 mini Twix bars and soft drinks in your fridge, plus a coffee maker. Nice but not necessary. There is a great coffee machine up in the World Café which is open all day/night and has tea, coffee, hot chocolate, lemon, honey, water, juice etc. And there are soft drink cans on a trolley in the Cafe too so if you need one in your cabin you can just grab one.
The cabins are lovely and pretty spacious. The balcony is an extra luxury.