We (my boyfriend and I) stayed at Elenas place mid-june 2014 and we really couldn't have found a better host. Elena was warm and welcoming and made us feel at home immediately - also, she provided us with all the information about bologna we needed (plus heaps more!) and even left us a delicious bottle of wine and some cake to enjoy. You can tell that she loves hosting people.
The place is situated in a lovely and quiet italian house with a beautiful patio. It has everything one could ask for; a big bed, living-room with built-in kitchen and a lovely balcony. Oh, and most importantly: air-condition! We were incredibly grateful for it during the scorching hot days...
To conclude, I can only recommend you to stay at Elenas if you're ever planning on visiting Bologna!