I would strongly dissuade ANYONE from getting a piano with "waterfall" or bevelled white keys! It's absolutely awful to play these pianos as your fingers have less of a surface area on which to play ... the fingers literally "fall" off the keys.
When you are used to a white key being a certain length, the 3-5 mm of length that are subtracted from the white keys on a "waterfall" keyed piano have the effect of causing the pianist GREAT frustration and I believe your controll of dynamic range is also, consequently, greatly limited.
If you tend to "stroke" the white keys at times -- and I think most intermediate and better players do this for expression and putting their whole body into a piece -- then you will be driven crazy by the waterfall feature. If you don't know if you "stroke" the keys or at least at times do a far reach that allows your finger to barely grab the END of a white key, then carefully watch (or have someone watch you play) yourself play for 2 minutes. I guarantee you will notice why a white key is supposed to be as long as it is with the standard "lip" that Christopher described above.
My sister has one of these pianos. I really enjoy playing the piano ... but I simply HATE playing hers b/c of that feature. So, I rarely, if ever, play her piano during the week each year I visit her (out of state).
I will admit that my sister is quite a good piano player (she was a music minor in college and is a piano teacher to about 10 kids) and doesn't seem to be bothered by her piano. I will accept that I am more precise and technical about things than compared to a lot of people, but, I personally think she has a brain-block somewhere to be playing that mess and also be teaching on it. She has a much greater tolerance for inferiority in that area of her piano. I would scrap that piano in an instant! Objectively, I think anyone would advise you to get a traditional "lipped" white key piano.
STAY AWAY FROM THESE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!