I made this upgrade when I was repairing a really sloppy shifter due to a worn shifter shaft sleeve. It does make a great improvement in shift quality. I can't say anything first hand about using Baker's solution as I used all Harley parts in mine. Lots of stuff available cheap in online auctions from motorcycle disassemblers. A careful study of the parts list and you can reuse some of your innards that are still in good shape. A donor from 2001 or newer should have everything needed.….some parts to do it with Harley parts.....
You get the hollow drum (less weight and inertia than solid), roller detent instead of the plunger, neutral switch only applies pressure to drum in neutral), newer style, not prone to breakage, round cross section shifter centering spring. I have no idea if all these improvements were copied from Baker or were all the MOCO's own ideas, but they all work. The only time I have a problem shifting is when wearing clunky winter boots and I get a little lazy.
Dynojet Quick Shifter is the only electric/air shifter I am familiar with. You could ride your bike like it wasn't there if you wanted to, You don't have to be in full race mode at all times. I've only seen it on FI bikes, but I do believe they have a universal kit for carbed bikes.I'm not planning on an electric shift I prefer to shift manually.
Another improvement you might want to consider is the Andrews close ratio 1st gear set. It makes 1st last about 5 mph longer, giving you enough time to get your foot up to the shifter. Also, I'm not sure why, but 1-2 and 2-1 shifts are now smoother than the rest, almost like a real motorcycle. Probably the way they cut the gears. Sometimes I wonder what a full set of their gears would be like.