I bought this keyboard as an introduction to piano. I wanted an instrument I could practice silently at home and with wide range of adjustable volume and headphone option, this keyboard is perfect for that.
Yamaha have a well deserved reputation in electronic instruments and it is easy to see why, even on their budget instruments like the P45. The plastics are thick, not flimsy and the keyboard has generously proportioned ergonomics.
The sound is really quite good through headphones, though the onboard speakers leave a little to be desired. You could be forgiven for mistaking it for a real piano, with your eyes closed and headphones on.
It has a reasonable range of features and sounds, and it's not covered in buttons and knobs like so many others. There is a handy and intuitive function button that allows you to change your sound type, which you can select by using the black and white keys. The black keys are matt, as opposed to gloss, which means fingerprints are not so much of a worry.
I'm impressed by the realism of the grand piano sounds, and if this keyboard was to fail I would certainly buy another.