Yup - my 900 is a functional arranger, harmonizer, bass machine ... but the keys in the top half of of the keybed have some "issues" lol - every 4th key is DEAD! chromatically from top down, you can play 3 notes, then SILENT, 3 more, then SILENT ... and so on. So, on top of the Rhodes, it serves as a bass machine, drum machine, recorder, arranger .... anything from middle C-ish down is 100%, but in it's current state, it's unusable (and unSELLABLE) as a full keyboard. (sad face)
Maybe someday, it'll be important to me to fix it, but for now - it's very useble as-is.

Don, I just checked - it's v.3 ... I'll look into the upgrade. Any advice? Worth it?

They seem to have tweaked some sounds. Can't tell too much though.
It's 3.0.1.