Enphase is an industry leader with very reliable products. In my experience their products are much more reliable than the leading competitor which sells DC-Optimizers. If you are asking about some other micro-inverter manufacturer I wouldn't be able to speak to that. I would say that the quality control of the particular manufacturer you choose is going to be the much bigger factor than the system topology you use. That is, one manufacturers product might be excellent and another's might be crap, whether you choose micro-inverters, DC optimizers, or some other option.
Micro-inverters tend to be most competitive on an initial cost basis the smaller the system.