I ran a few tests with this belt before using it in a 50k trail race. I have a love-hate relationship with waistbelts - easier on my body but the bounce factor kept adding them to the 'ebay sell' pile.
In my opinion, the Jurek Endure performed exceptionally well in the 50k - two bottle access (Tailwind + Water) was perfect for the longer sections between aid stations. No leaks and I found the mouthpieces to be pretty easy to operate.
Stuffed my wallet and a little TP in the zipper pouch, and a snack + my packable rain jacket in the outside expandable pouch - it was easy to fit it all.
No Bounce, no chafe, just hands-free. On one of my shorter test runs, I brought just one bottle but still, the belt never bounced! The bottles are durable and the mouthpieces are easy to clean.
I'm a believer.