NCGA:
It's natural for you to be asking about how it 'feels' to fly a -12...and I'd agree with all the above responses. The best analogy for how a C172 felt to me is an old Chevy truck with manual steering. I was constantly working the trim wheel due to the physical workload otherwise asked of me by the yoke. The Cherokee series struck me as '1960's Impala-like', again that kinda loose, 'wait for it to respond to the control inputs' feel but without quite as much horsing around of the plane. When we began flying AA-5 Grummans, it was like a revelation. Same 4 seats, same hp up front, but far more responsive and with less workload (so much so I was told it was a bad IFR trainer...which turned out to be totally untrue). So I've always considered the Grummans the benchmark for 'responsive but stable' GA singles.
That benchmark bit the dust when I flew the -12, which was no less stable but f-a-r more responsive in the sense that very small control inputs are all that's needed, and I never felt that 'physical workload' sensation the other a/c demanded.
BUT I'd encourage you to move beyond 'how it flies' and be sure you form your own opinion on 'how it feels to fly in it' by which I'm referring to the small cockpit, the small stature of the plane, and the 'You can have any color you want so long as it's black...' nature of buying/building an E-LSA like the -12. Like all the LSA's I 'tried on' at Sebring's LSA Expo this year, things feel a bit 'intimate' when flying the -12, the resonant noise from the engine struck me as being distinctly different from the conventional Lycoming 4-cylinder, and there's little ability to adjust the cockpit to suit the pilot. As was suggested above, I'd encourage you to seek out a demo flight in a -12...and pay attention to how you feel about being in it, listening to it, and flying it. (In addition to VAF, you can get help from the folks at Van's to track down a relatively nearby -12 owner).
Good luck on the (ahem...) 'research'. What a great job you have ahead of you.
Jack