I have the same experience with the Ronstan smart ratchets. First batch broke easily, new batch (since 2004) is dependable and actually quite good. Even to such an extend thatI didn't saw the need to spend more on Harken and I still don't.

For spi sheet use always go for smart ractchet (or autoratchets). Makes snuffing easier and you really don't want to go down to the leeward hull when singlehanding to switch settings.

Wouter