Original poster here. We bought the D39 27 months ago and love it. It is quick and has great cruising interior. Our D39 is the predecessor to the SQ , very similar. We really like the aft sheeting of of main sheet, and big wheel. We like other D39 owners wish our traveler was longer. Even with the shoal draft keel this boat points very high. It is easy to trim close hauled, with the stock 104 headsail, and locks into the groove easily. We sail faster than the theoretical hull speed on a regular basis even with well used sails. With the gennaker on the sprit, the boat is a missle with any wind at all.