Used a Boomkicker for past 10 years.
3 years on my Shark 24 one design (entire fleet has adopted them), and now 7 years on our G-26. Makes life so much easier (and safer) when reefing or dropping the main. Replaces the topping lift. Gives great sail shape when you need it.Rather than rave about what it does, I suggest you read the manufacturer's specs so you will totally understand what it does. They are available here (on sale) in the chandlery