We stayed at Joshua's House for a week with two very young children. The staff at Erika's Marine were very helpful and quick to respond when we had a request or question. The location of the house is somewhat remote, despite being an easy walk into town. This was both wonderful and at times frustrating in that we had to do the walk often with little kids.
The view from the deck is phenomenal, and it is unique being right next to a small air strip.
The house itself is a quirky layout-- somewhat dark and small-feeling, but that didn't really matter as we spent almost all of our time out on the patio. Although it is a relatively new house, the salty humid air has taken a toll on the metal work (locks, bolts, hinges, etc.) and so it appears to be much older than it is.
Union is generally very windy, so we found that many of our belongings were blowing around. This is an awesome location for kite-surfers; the kite-beach can be seen from the deck and it's a quick walk... more