Screw "convenience". There are things much more important than convenience. Honest elections that can be audited if need be is one of them.
Pesonally, I don't see how ANY voting without paper ballots can be trusted.
That won't fix it either. Some method of positive identification and recording of vote must happen or we will continue to have fake election results. We require more identification to buy a gun than we do for a voter. Personally I think secret ballot is over rated if you want honest results.