I stopped using them this year. It is 1 less battery for maintaining and charging.
Different strokes for different folks.
Are you just looking for a switch with an indicator light on it to tell you that its on, or looking for a charge indicator style switch?
Check out taildraggerrc.com for some HD style switches that are illuminated.Just a switch with indicator light...don't need the charge indicator. IBEC seems like a clean solution too though I like the redundancy of a separate battery circuit.