Really, the thing with Septimus is that it's a fancy sci-fi setting with everything. It's gonna be a long read. That's one of the only downsides. The others are that the power system is obtuse (thanks to the d6 system, which I enjoy massively otherwise), and there's a few spots where the text will merge with the background images and cause a minor headache.
Other than that, it's great. That's all I'll say. The setting is massive and intriguing, with a mix of post-apocalypse and soft sci-fi. It's a great game, and it's worth picking up.
[5 of 5 Stars!]