Hi Jakub,
It's really lovely way of presenting results and I can see how it summarises a session really well. As a moderator, I generally have a 'session guide' which I do in an excel spreadsheet, with tasks on the columns and each participant in the lines - and I use it to take notes during the session (touchtyping course coming in handy here). After the test it is easy to analyse different answers for the same task and to compare users, filter and analyse results. Your sheet seems like a natural way of presenting these to clients - so I will definitely 'get inspired' by it next time. Thank you so much for sharing!!!!!