I can open my non-spring-assisted EDC with just a thumb stud as fast as I can open any button-spring folder.
Probably faster due to the more-ergonomic location of the thumb stud.
But, I do still have one automatic just for the fun of it.
I take it out of the safe every now and then and flick it a few times, and then put it back.
The EDC does the cutting jobs.
For flicking and ker-chicking
Runs about $80 - $90 online
Not a sturdy knife, but lots of fun to play with and admire
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For EDC
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Schoolboy's knife
http://www.courts.state.va.us/opinio...wp/2708041.pdf
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Wife's yard knife
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Mumbly-Peg knife