Very positive, indeed. More snap, boogie and impact than P3ESR or A1. As my room seems to accentuate treble, though, I preferred the slightly rolled-off treble of A1s AND got a very nice deal with them. With that said, I still crave to retry the Tablettes as they bring some danger to the music. I tried the Signature version, by the way.
Edit: Let me add that I also preferred the bass of the Proacs to either P3ESR or A1, stronger and faster. However, here I'm also comparing different stands and room treatments, so I would not generalize my observations to all surroundings. Their treble had this Proac shine which I like a lot, although at times it became a tad too much.