I spent a few weeks in a language homestay in Russia in 2017. I had a really enjoyable time and made friends with some great people. The family was very friendly and there was plenty to see and do. I knew a little Russian which helped, just some greetings and please and thankyou etc. Overall, this was a much more real experience than being a tourist and you get to meet real people. You also get to see the personal lives of your host family, and get to know their world views and this makes for some great discussion of different perspectives. You will have some great stories for your friends when you return from the beautiful Russia. The only downside is that you'll realise that Russia is a really massive place and you could spend forever travelling around it and still miss some amazing scenery, places and people.
If you want something more substantial and 'real' than some pre-packaged glossy brochure, do this program.