No experience with that particular one, but have used brake boosters of other design and material (particularly Shimano carbon versions). Still have them on a few bikes lacking a sufficient brace on the seatstays to help stiffen up the rear brake; on older forks they sometimes were needed too, but none of my newer forks do I find them useful. If you have need of a stiffer brake interface, they should help.
"...the people get the government they deserve..." suum quique
RB Design is small Slovak company specialized on milled bike components, that are used by biketrial world champions. http://www.rbdesign.sk/en/en_index.htm
They also developed their own and patented freewheel system Rollin' Roll based on needle rollers rather then commonly used ratchet/pawls http://www.rbdesign.sk/en/anim.htm
(click to Volnobeh = freewheel, Zaber = engaging movement).
I have only RB Design seat clamp Close-1, it's beautiful piece of workmanship and 'new edge' design. I'm pretty sure you will not be disappointed with the brake booster.