I've been reading along with your impressions while I was rereading (or more accurately relistening to) the story. They were pretty entertaining, especially some reactions to major plotpoints. I feel like this format of (first) reactions is generally underused for anything but games (and maybe movies). Regarding the question about invisibility cloaks you posed in Chapter 104 (that comment section is closed so I couldn't comment there) "normal" invisibility cloaks do not seem to be that rare, as one of those was among the items that Harry wished to be given to all his friends who decided to stay at Hogwarts, so it is not that surprising that Draco has one.