I got this game as part of a Humble Bundle. Surprisingly enough, it is less weird/girly than it looks.
For my first playthrough, it felt similar to a rogue-like game such as Faster Than Light (with a lot more reading and plot than FTL). Although the dungeons are slightly randomized per playthrough, second and onward playthroughs will be a lot easier than the first, but there's enough plot to warrant at least a couple playthroughs beyond the first.
It's not the longest game ever, but it's not the shortest; it might take you between 2 and 5 hours for your first playthrough, depending on your reading speed. For what it's worth, I enjoyed Magical Diary more than I enjoyed The Stanley Parable.
A 4/5 rating wouldn't go amiss for this game; the major downsides is its relatively short length and "poor" graphics (they aren't poor, but rather underdeveloped. A bit more detail here and there wouldn't hurt).