Sharkbites are garbage, but IMO pro press is legit. They hold well, and though I have seen them leak through improper installation, that is always a risk. I haven't seen enough old pro press fittings to really see how well the joints hold up over the decades, but I have seen enough failures in sweat fittings to appreciate the larger radius and thicker material of the pro press fittings. You can argue that failures in sweat fittings are due to improper hydraulic design, but excessive water velocity is almost an industry standard, as the math behind water sizing is very fudgy, if the installer even bothered in the first place. Also, pro press installations have considerably better water pressure. I wouldn't install pro press in my house, but only because I know how to sweat, and pro press fittings are expensive.

That being said, the best domestic water system is expansion pex, which is cheaper and easier than copper anyway, so if you have the opportunity, just go with that.