I've used one on my boat for 4 years or so. When rigged correctly, they are not flimsy. For protected waters, I can sail with the outboard
on the dink and raised by the dinghy-tow. If I think it is going to be at all rough or I am not in protected waters, I always take the outboard
off. The dinghy-tow makes it very easy to mount and unmount the outboard. You just raise the dink till the outboard is next to the stern rail and lift
it off. The dink offers very little water
resistance, so it does not slow your boat while sailing, as it would if you towed it behind. You can handle much rougher conditions with the dinghy-tow than would be appropriate to just tow the dink with a line behind the boat. I've been in big seas and 30+ kts wind
and not had any issues. I would not use it for any extended offshore
passages. I did use it down the outside of Vancouver Island in PNW. All in all, I like it. It sure makes using the dink quick and easy.