A cool place in hot weather. There is a toilet. Very interesting lighting for photos. Informative and fresh. 20-30 minutes will be enough for the head.
There is always a long queue at the tank, but as a rule it's all for electronic tickets, and if you buy a ticket inside, there is almost no queue. When buying tickets, I must say that you need an audio guide, so it's more interesting to walk around it. There is no laser show here.
We saw everything we needed to see in the closed reservoir.
The advantage is the video sequence.
There are no disadvantages.
I would like: cheaper, memorable themed souvenirs. That's about it, I guess