We recently spent five nights at The Cottage on Park with family members, including a 13 and 10 year-old. Everything was as advertised and we were quite pleased. The location is excellent if you want to be near the heart of Hilton Head without the noise. The pool was small, but great. The outside grill was new and while the tank was empty, it was not an issue because there was a spare in the shed (and when we reached out about the empty tank, the office was very responsive!).
The kitchen was was well stocked with utensils, etc. They could use some new frying pans, but overall, they had everything we needed and it easily accommodated our group of six.
The house was well cleaned and charming.
The pool and beach gear was well-stocked with chairs, a wagon to haul stuff to the beach, noodles, chairs around the pool, etc.
The only complaint, which cannot be helped in HH is that the large oak tree in back constantly shed leaves and seeds in the pool and all around. It was hard not to track this stuff into the house and my only recommendation would be for a rug to be placed inside the sliding door so this stuff didn't end up around the house. That is a nit-pick. The house is great and we would not hesitate to stay there again.