Beware of built in demos whether online or "in person". Some instruments never sound like the demo when played "live".

Your best bet is to try it in person. Some places allow a 30 - 45 day trial period.

Demos are done by pros using state of the art recording techniques.

I have experienced this more than once.

Not mentioning any brands, their online demos made me want to get their keyboard very much. In person they were extremely dissappointing.

Hope this helps someone to avoid an expensive unwanted suprize.

Scott