Just got back from an Easter holiday vacation with family. Gave first-time rides on the TI to six people and the hakas were a hit!
Unfortunately the wind was quite uncooperative (more like nearly nonexistent!) so we didn't get any exciting sailing in.
I was pleased to find the hakas work well with the tramps, which I think is excellent with little kids on board. I could use two bungees on the back without any trouble, the front we just used one on the outside corner. With the grippy rubber tread stuff I used on the underside they don't move at all.
One nephew took to this like he'd been born sailing...
He was perfectly comfortable anywhere on board.
His dad and I had a few choice words for him when he started dragging his feet in the water while we were pedaling - very effective water brake there!
A bit later on my sister was in the front seat (she was the lucky one - we had a short period of good wind while she was out) and we rafted up with another nephew and her husband in my other kayaks. BIL brought the youngest along and he decided he wanted to ride with mom instead - underway transfer!
He'd move back and forth between the haka and the tramp from time to time, very handy having both options available.