I am in the camp of saying that with locking tuners there is really no need for a string winder. Let's face it, you're practically to the fine-tuning phase once you've locked it down… It only takes a couple of turns of the button to get up to pitch. Like Doc said, you only need 1/2 to one turn around the peg for stability so it's just a time waster to use a string winder on them.
That being said, out of nine electric guitars I have locking tuners on seven (one is a 10-string for which I just haven't pulled the trigger yet, and the other has pewter colored hardware which I can't seem to find a reasonably priced). Then there are my acoustics and my bass… none of which have locking tuners. I much prefer to use a string winder when changing strings on any of these… It just makes things go much faster.
As for types of winders, I have a $.99 Ernie Ball cheapo and another one with a wire cutter that I spent about 10 bucks on (I don't remember the brand… probably Planet Waves). The fancier one is nice because of the wire cutter and it also doesn't have the tendency to come unscrewed from itself when doing the bottom three strings on a 3 x 3 headstock (which is a problem I've had with cheap ones over the years). Both types, however, wind strings quite nicely.
