The Steinway is beautiful sounding and inspiring to play - it absolutely exudes emotion, which should be the goal of any musical instrument. It doesn't feel like "software", it feels alive and musical. The upright is easily the best I have heard, and the Rhodes is also really nice.
I really appreciate the ability to record your ideas on the fly, and then save them to your cloud or fly them into your DAW.
The interface is very graphical, and keeps me using the musical side of my brain instead of having to switch and think like an engineer.
Last, but not least, the package is affordable and a breeze to install. You can't say that about most software.
I highly recommend!