Sit down, set the curve to your liking, and then play each note up and down the scale, paying particular attention to the range staring at A below middle C, and up to and including the C above.

Then make your own mind up if the transition from notes is consistent or otherwise.

Inconsistency isn't an exclusive trait of Roland pianos...some Casio have the same issues as well...they suffer more in the lower and higher ranges...the middle is actually not bad.

I'm not picking on Roland...Yamaha's Concert Grand on the T3 is lacking in consistency.

I wish I could try a Korg, but they don't carry the brand at my local store.

Ian