This is only my opinion acoustic concert grand vs. CP88. Back in the 70s I worked for the Steinway dealer in sales in Providence, RI. We had a 7 foot Steinway model B and a 9 foot Model D concert grand pianos in our rental department. I have never played any digital piano that comes close to the sound and feeling I got when I played either of those instruments. As a side note I don’t have the time at the moment to watch the whole video and not sure I’ll change my mind when I do watch it. I will add 2 years ago I owned a Roland FP80 bought in part on the recommendation of Bill Lewis. That FP80 is one fine digital piano but it still could not give me the same sense of satisfaction playing a 7 or 9 foot Steinway.