Yes I am glad I had the piano, It does take up quite a bit of room though so this is def worth considering.
Depending on the sort of music the pianist played it could get very loud (I did not put any requests in, apart from our first dance, so just let him choose.)
As said we did choose our 1st dance song and there was still enough room for us to have a dance!
It looks great on our photos, we had the mice come along and they did some fantastic shots of them playing the piano and us dancing.
The only thing that I would recommend is maybe suggesting the sort of music that you would like. Other than that it was the perfect choice for us.
Sorry cant post any pics as have no idea how to do it, but I can tell you that the piano was located quite near the door (as you go thru the double doors it was on the left) it was not intrusive in the room at all (We had 3 tables of 10)
Let me know if you have any more q's and I will get back to you!