I'm the guy who needs a flowchart (I like how they lampshaded that) with River Song episodes so I'm always filled with trepidation when she appears, as I fear I'll get confused.

But anyway, I really enjoyed that. Light-hearted, but with an increasing emotional edge as it draws towards the last third. The limited space diary was really sad, but it did get a happy, if bittersweet, ending, with the 24 years spent together.