A lovely apartment, with merciful AC for the summer. It's conveniently located near the heart of Williamsburg and the L, G and M trains. The apartment is up a few flights of narrow stairs, so probably keep that in mind if you have accessibility concerns or large suitcases.
The room was tastefully decorated, bright and sunny. The bed isn't the most comfortable, but the linens were nice and the AC made it a pleasant hideout from the heat. I did not see much of Martin, but he was welcoming and friendly when I did.
Overall, a great place to stay.