We stayed here in early May and had a good time. It is a little further from Jacksonville and closer to St. Augustine, but that worked out better for us as we found more to do there.
Depending on what you’re looking for will dictate how good of a time you have. Cell phone reception isn’t the best on this part of the island (not just the house), but the house has strong and fast Wifi.
You will find you often have the entire beach to yourself, which can be nice. The sand isn’t the sugar soft you might find in other beaches, but you also will find more things when you go shelling, you just have to watch your step when you’re barefoot.
The island and the house had a little damage from the hurricane in October. In most cases it wasn’t anything major, but something to keep in mind when you see photos of here and elsewhere. For instance, the palm tree and hammock were destroyed by the storm.
The owner was very responsive to the one question that we had, getting security deposit back after returning home, etc. The house had everything you needed, plus a new deck that was put on to replace what was damaged. There were a couple windows that probably need to be replaced so that you’d be able to watch the ocean from inside, but you may be outside so it may not be a problem for you.
This part of the island is part of the turtle reserve, so depending on when you go, you may see evidence of turtles laying a nest or even hatchlings (we didn’t when we were there). This also means that you need to comply with the dark sky rules (close blinds at night for instance). On the plus side, this leads to great stargazing and no light pollution.
Overall, it was nice trip trip but you'd probably want to see some updated pictures so you know what it is like now.