Do the courts in Russia work like that too?
Yes it can be. Many examples exist in mass-media. Russia has very big index of "corruption perception" because of it.
Money and connections can override law...

Are there 5-star prisons in Russia?
I do not know about such things in official way.

However the whole picture is distorted by several facts:
a) Mass media writes primarily about injustice by nature. Hot news is dirty ones.
b) Typically there is always be one side in the court which will say that desicion is "unfair". By nature of people.

So, it is difficult question "how much courts are corrupted?"... Corrupted it is. But our perception is distorted about scale of this corruption.

I have examples of normal work of justice system with people with money and connections, like police chief of the city or over-middle businessman.