I now have three belts from Mio Marino that incorporate the Linxx buckle.  I previously had another company's ratchet belt that utilized a lever-type system.  Those belts only lasted a year and the springs and metal did not hold up, rendering the belts useless.  The Linxx system has less moving parts and seems to be of higher quality construction.  So far, I've had no issues.  I also like the different styles that are offered.