Everyone shares about how great the Spectra is - but what are the things you dislike about the Spectra?

I use spectra pump parts with my Philip avent motor! It is good that the pump parts are easier to find and there are different flange sizes for selection. Asian nipples are sometimes smaller than the default 28mm size. The parts are available from shopee! https://shopee.sg/product/242594539/7732031072?smtt=0.0.9