Just back from a week on the Sagitta so I thought I'd share some thoughts with my fellow travelers.
We did the Sagitta's 6-night cruise that traveled from St. Lucia to Dominica, Iles des Saintes (part of Guadeloupe) and Martinique. First the good news: Island Windjammers (IWJ) rates highly on coordinating hotels, transfers, taxis, etc. They are polished at getting everybody aboard the vessel with ease and comfort. This is especially important for the Sagitta, which is too big to dock at any of the destinations; instead, the crew relies on a couple of Zodiacs for all ship to shore transportation.
More good news: Chef Lenny was great at accommodating those of us with special dietary needs, including those with allergies as well as those pesky vegans. I think everyone aboard rated all three daily meals as very good or better. Another very nice aspect of this trip is a 5:00 happy hour, where drinks and punches were served alongside pizzas, grilled tuna, fruit platters, cheese platters, and a lot of other tasty finger food.
The cabin we used is intended for two people. It has a bunk bed arrangement in a room that measures about 7 by 7 feet, together with a bath that is about 3 by 7 feet. The bath has a shower stall. The main room has some storage shelves, some wall hooks, and two drawers under the bed. The cabin has A/C and an oscillating fan. There is no problem whatsoever keeping the cabin cool. The crew stows your empty luggage elsewhere on the ship to give you a little more space in the cabin. All in all, the cabins are comfortable, clean, and get the job done.