Very comfortable accommodations for 6 people - we were staying a couple extra days on St. Vincent after a Bequia visit and two of our party left after one day. The house is a serious climb up from sea-level, but much of the island is the same (they're volcanic, after all - part of the beauty). A rental or taxi service is definitely recommended getting to-and-from the house. We did walk, but it was a hike more than a stroll. Thus, more difficult to get to the beach, restaurants, and shopping, but we thought it was worth it to be away from the hustle and bustle (ergo, traffic noise) of town.
Darel was super responsive and supportive before and during our visit - only downside is we never met him face-to-face! But that's how well he had everything organized, we didn't need to. From check-in to check-out, everything went smooth and as expected.
One point of feedback that I'm sure is easily remedied: Amenities in the house are a little sparse. It would have been nice to have additional blankets for the beds (though there were plenty of towels and sheets!), as well as a couple additional sets of dishes, glasses/mugs, cutlery, and cooking pots and pans - we made do fine, but if we were staying longer it would have been more of an inconvenience.
All-in-all, however, we enjoyed our stay and would stay with Darel again when we're on the island!