I really liked the place as a whole - the aquarium side is excellent. This house is OK, but both the beluga and walrus enclosures are just a little limited in size and a little gloomily-lit. The viewing is an odd mix of very restricted and very good, depending on what the animals are doing. The species are very nice, of course!
This does seem like a very good facility, and it's a shame we don't have something similar in Britain.
Regarding the 'window' it appears as if it is a gate, so they may have an outdoor pool!