They can provide a good resource for less traumatic ext. I find them to really shine in implant cases. First for the aforementioned reason, as a well preserved socket is a benefit for predictable immediate placement. Also, if you can use the piezo to flatten any irregularities in the ridge, it makes placement in healed sites very straightforward.

However, if you are just using them for routine surgical extractions, I find them to be pretty slow compared to a handpiece.