This is perhaps the best example of Lovecraft in his more dry tones. If you are hoping for a first person perspective, down and close to the horror you won’t really find it here. This is the retellings of a crazed survivor, a prime example of Lovecraft’s tendency for that trope. More of an after action report then the actual tale as it unfolds.
Unlike a lot of his other work, this example of his writings does not contain a lot of his problematic views. Other stories are racists, sexist and xenophobic, however here none of that appeared evident.
The writing style is dry though. It takes a peculiar liking for this kind of work for other readers to appreciate it, but for me it had a lot of good building blocks. He had links to other stories in his mythos, and he definitely had a lot of details in the story itself, maybe too many for some people.
You can see though where he inspired people after him. This story could easily fit in the worlds of Stephen King, Clive Barker, and many newer horror authors.
If you like Lovecraft, or any of his inheritors (Clark Ashton Smith, Robert E Howard, Robert Bloch, and others like August Derleth) then this is something you want to read.