I also have those latches and they work great. The do need some lube every now and then. What's funny is I bought one at the Co-op and then found the exact same latches at Southen States (one mile down the road) for half the price. In my opinion TSC is high on a lot of things that you can find at other places.
TSC tends to cater to the "horse owner" and jacks their prices up on a lot of items that you can find elsewhere for less. JMO
Chris