Having lived there and conducted business there in the 90's for 4 years I can tell you corruption was rife. today it can be easier, but you need experience in the market, someone who knows the way things are done and who to turn to if things go wrong. Someone earlier said that they only have experience of corruption in Russia from the movies and that you couldn't really trust that. Well trust me, if I were to write a script of what I have actually witnessed, nobody would believe it! But would I do it all again, hell yes.
It is a great country with great people and of course there is a risk/reward ratio, but risks can be kept to a minimum.
Do not place too much faith in the law, it will not be there for you.
Pick a partner and tread carefully.