We had a wonderful experience with Nadya. Although we only stayed at her apartment for one night, she helped us arrange our whole chunk of time in the region. She arranged transfers for us to and from the train station (her friend Sasha met us right outside our carriage), she found us a home-stay in Listvyanka that was cheaper and more awesome than anything we could have found on our own, and she was very communicative when we needed her - namely, when we couldn't find the apartment! The place itself was great - it was really nice to have our own space after being on the train for so long. Everything worked well, and it was very well-lit, so it felt very pleasant. If you're coming to Irkutsk on the Trans-Siberian or otherwise, Nadya's is a wonderful choice.