The bunk bed looks great and a good price too as it includes matresses. Bunk beds save space which is their main selling point. I got bunk beds for my two boys aged 6 and 4 and they love them. The instructions with mine were a complete nightmare and had 41 bolts that needed putting in with an Allen key that wasnt fit for purpose. Ended up using an adapted power tool to fit it together. My advice would be to find a friend to help, have some fun and try not to swear too much.
It looks lovely and seems really good value with two mattresses and the extra sleeper below the bottom bunk. My daughter’s room is quite small too so bought a bunk bed so she could have friends over and for extra storage with lots of shelves and a draw under the bunk bed. I am very happy with the quality https://www.amazon.co.uk/gp/product/B07DMPNFKR/?th=1 . Definitely worth paying a little extra for an extra feature like the under bed sleeper or the shelves.
This is an older thread but I think it might be worth to say there are a lot of good used bunk beds out there. We got our first one over church connections and the second one over notice boards. It tend to be the more expensive and sturdy ones which survive their first occupants, so they have passed the quality test. With a pair of new mattrasses bought separately I payed 300-350 for each bed, retail was around 800+. Both boys ( 10 + 17 ) have their own room but still prefer bunk beds and love them. Easy solution for sleepovers anyway.