I've had a dinghy-tow for 5 or 6 years. They work really well. It puts very low drag on your boat, so you effectively do not loose any sailing speed. In protected waters I leave the outboard
on. If it is a longer passage
or in less protected waters, I take the outboard
off. I've used it on the outside of Vancouver Island in pretty rough stuff without problem. For long passages I put the dink on the foredeck. One thing I really like about it is the quickness you can get your dink ready. No fuss, no muss.