I recently installed the Mast Stepper II on my trailer. It does work. It is a little hard to tell exactly what you get from the Hobie catalog. For your $45.00 you get 3 pieces of short rope, a swiveling pulley, and a tang to hang it on. If your mast support is 30" or so above the tramp cross bar, basically higher than you head when you stand next to it, it works. You mount the tang and pulley as high as possible, run your winch cable / rope through it and fasten that to the forestay. Use a piece of short rope to tie your trapeze wire to the front corner of your tramp. After installing the step link, have a helper wind the winch while you balance the mast on your shoulder while standing on the tramp. It is easier, and no strain on you or your winch helper. I plan on trying it singlehandely soon. So in a nutchell - it works - but you can make one yourself for less money IMHO.