Done reading. My impression is pretty much the same as the previous volume. Fairly well written novel which keeps being engaging despite being mostly about nobles having noble problems, I mean rich people having rich people problems, which I'm normally pretty meh about. Relationship driven and despite that, fairly drama-light. Prone to bouts of "harassment is fun when it's girl on girl".
Often it undercuts itself by how the viewpoint character Misaki doesn't have any personal goals besides "become a good enough maid to be worthy of the privilege of serving my mistress" - after four volumes, that's just too weak. On the other hand, the problems that spring up are personal, just personal for somebody else, and Misaki being always willing to lend a helping hand, whether it's to the ladies or to the maids, is what makes her so endearing.
This is the final volume (in JP too), it ends in a middle of an arc, and I must admit, I didn't expect this when I first started reading it, but I'm genuinely sad I'll never learn how it all ended...
