When I first started riding, I thought this and a monty hose splitter would make me ride like a pro, the splitter was alright, but I hated the spray
A good grind and pads and a well set up brake will hold you fine, if you REALLY need more hold I prefer tar over spray.
Tar grabs better to me, and it's MUCH easier to carry a little lump of tar with you on a ride than carrying a can of spray