There is a distinct difference between pianists and electronic keyboard players. I fell into the pianist category and I needed a stage piano to be able to take around to rehearsals/gigs etc. After having a look at a number of different reviews of different products, most noticeably the m-audio pro keys 88. I knew I only wished to spend up to £500 - absolutely no more and during my research, this looked the best bet.
When it came, I tried it out straight away. It has a lovely feel - granted not exactly like an acoustic piano, but certainly (at least to me) far better than a keyboard.
My only gripe is that it doesn't have a dedicated line out port but this is not the end of the world as the keyboard does have two headphone sockets.
This I would say is perfect as a first stage piano. It's not got all the features of the more expensive models. However, the feel and sound of it is lovely for the price I paid.