I made a Reservation online mainly because of the price, and everything went smoothly—I was able to relax and take my time.
The Room walls are thin, and on one night the snoring from right next door was very loud.
Since it was midwinter and not a tourist season, there were few guests, and I had one Room to myself for five days.
The only other guests seemed to be people photographing stars and birds, and anglers.
In warmer seasons, up to 16 people can stay in total, so it may get crowded; if you prefer a quiet stay, I recommend avoiding those periods.
What I found useful to bring were slippers, sandals, and an electrical extension cord.