Worth every dollar, if you have a large spare pile of them lying about. Pricey for sure, but the quality is top notch and the custom made pulleys will last a lifetime. The only thing that will ever need replacing is the belt, and who knows how long they'll last with proper care and adjustment. I have had mine for about 5k miles so far and not a gliutch to be had. I do have the tension tool for adjusting/measuring the belt, but I only have to adjust it when I pull the rear wheel. I just put on a new tire yesterday and tweaked it back in, and now she's good to go. The belts do not stretch at all like a chain and they are far far cleaner and mucho smoother and quieter than chains.
But....for the price of the kit, you could buy 3 sets of chains and sprockets. If you look at it that way, it is a good investment because the belts supposedly will last as long as 3 chain/sprockets. And, if you buy it and don't like it, or sell the bike, you can always go back to the chain and sell the sprocket stuff and recoup your bucks
