This looks truly stunning - you have to watch it on a large screen TV otherwise you won't get the full effect. It's pretty amazing how much detail the special effects team managed to put into the graphics. There were a number of times I sat there and thought "wow" :)
Besides that, the programs themselves are quite informative and live up to the title - they act as a good general guide to the planets. Earth is not covered, but that's okay. I guess the producers are assuming you're already familiar with the third rock from the Sun. However, all the others - including Pluto - are included.
My only gripe - and the reason for the 4 stars, as opposed to 5 - is the lack of extras, although, to be fair I didn't expect a whole lot. There are two very short videos about the Sun and Moon - standard def, I think - and neither run more than five minutes long. It would have been nice to see how the graphics were created or to see some other behind-the-scenes stuff but I understand it costs money to produce that.
Anyway, if you want something to show off your Blu-Ray then this is a definite candidate. If you're new to the planets you'll find it fascinating and informative and even if you're not new to these alien worlds, you'll probably find the effects spellbinding.