Really helpful and well managed extension which considers a lot of things. I would like to address 2 issues:
1) In pages where we have .svg files (mostly with black text written on them), the black background makes it really difficult to read the text. For eg. https://www.geeksforgeeks.org/page-rank-algorithm-implementation/
2) Some rendered elements of a page don't seem 'clickable' until the entire page is loaded, this gives a sense of latency of 2-3 seconds. Problem primarily faced on facebook.com ( especially on loading it for the first time of a session)

saves my eyes from straining, thank you very much :-*

This is the first add-on I have found that makes Facebook dark WITHOUT ruining other elements of it. It looks naturally dark as the website intended it.

Dark theme everywhere and effective. Not gonna lie, there are a few pages that will have issues with the color change, but that's really on the pages more than on the extension, the fact that it works so well is an amazing achievement. Some people complain that is not a great extension for reading... but if they read the description they would know that this just to have an ever-present dark theme. For what it does and is supposed to do: 5/5 stars.