All switches fail at some point, including the little automatic one in those pumps.
I will only endorse 3 switches, (3 types of switches anyways).
1) Rotary Switch (such as the ones Blowsion and others sell.)
2) Military grade toggle switch (such as the ones I sell bare or build my Surf Armor switches from.)
3) CPI Military grade Rocker switch for handle bar mounting. (Do not be fooled, there are two distinct versions of this switch and one is garbage. Blowsion seems to be selling the cheaper version for the last few years.) The first one I had was military spec and lasted for well over 7 years. I went thru 2 replacements from blowsion in less than a year before making the switch to rotaries.
I have no direct experience with the auto bilges so I can't comment on durability. If I was to install one, I would want the ability to override it to run manually or turn it off for storage so I would end up installing a rotary switch and defeating the whole purpose anyways.