I guess it depends on how you use it.
I tried combining it with a YAMAHA acoustic guitar, and it turned out great.
Some people may criticize it for its accuracy, but I think it's a great sound source worth the money.
I'm sorry, but it's up to you whether you make it live or kill it, and if you're particular about accuracy, I think you should buy the real thing.
This piano sound source produces a very beautiful sound depending on how you use it.