It's been less than a year since installation. With normal use the sprayer now leaks out from the spray handle whenever the faucet is turned on. I disassembled the spray handle myself and checked every orifice, O-ring seal, spring and retainer. After reassembly it still leaked. Poor design or tolerances within and cheap materials (plastic). When the item can be the source of a leak that can damage other things in your home, I can't accept the compromise. 
Scrap the low end products if you can't get the seals right.