They work great, I have that along with the Piranha TB from BXpanded. The PTB is always on and the RR goes on top, depending on what you are doing you may only need the PTB. Check out both on YouTube, a lot of videos of both. I have used the RR on about 1/2 acre of field and within a month had the start of a yard.
It's a great addition to the tractor. I've ripped out some big wax myrtles with mine and also use it to prep my feed plot. It's on my FEL most of the time.