That's pretty much the same setup, only newer, that we took to WDW in June 2011 and were very happy with the results. My brother had the S9100, which he has always liked, but the zoom has been acting up for awhile and got him the Panasonic zs20 to replace it. Even though the Nikon super zooms don't get very good reviews, they are very nice cameras. It does appear, at least in the past, that the zoom is more susceptible to issues over time though. Just something for you dad to keep an eye out for.
I borrowed my dads Nikon p300 and still use it 'til this day on occasion. I was looking at the canon s100 at the time, but borrowing his camera worked out much better and cheaper
I think you will be very happy with your purchase, it may not be quite as nice as the s100, but they are very comparable and the you can't beat the price you got it for. The image quality is nice and was also very happy with the video. The only thing I wish it had was a RAW mode.
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