OK, some observations. It looks like they used the UN official documents as a part of their corpus, so it translates regular news from Russian into English almost perfectly. I was actually stunned how good the translation was.

But once you step away from it, quality goes down. I tried translating random pieces of Russian literature and it makes obvious mistakes. It can't even manage the structure of sentences, never mind word choice.

Translations from English are also bad. For example, it translated "I never felt that the translation is off" as "I never felt that the translation is turned off".