I have used all three on Pex, the wedding band, stainless , and sharkbites, I would classify the sharkbits as more for emergencies, but have seen them hold up for years. I use mostly the stainless ones now since they are easier to position and crimp with a smaller one size fits all crimper. I have also started using the plastic type connectors with good results. I have not had one of them fail yet, but have had some of the early brass ones fail in my home. Once they are crimped on it is compression that keeps them from leaking. The stainless ones are also the easiest to remove if you ever need to, just put the crimper's back on and twist them open or apart.