The first of the official Ghibli films, Laputa is most similar to its predecessor Nausicaa, but whereas Nausicaa was a SF epic, this is more of an action comedy-adventure with a fairly weak SF premise.
For the first half hour of the movie I thought I was going to love it. Once again you find yourself in awe of Miyazaki's attention to detail, and his ability to conjure up an imaginary world in meticulous, beautiful perfection. The animation, though still not in the league of the later Ghibli films, is a little better than in Nausicaa.
I mentioned in my review of Nausicaa that one character is drawn in a more 'Lupinesque' anime style. Here there are a whole bunch of them: the pirates. They provide the comic element in the film, though quite why it needs a comic element I'm not sure. There was nothing funny about Nausicaa, and I think it was better off for it. Still. having said that, Dola, the pirate leader, is easily the most memorable character in the film (even if she's basically a female Long John Silver. Don't be surprised if you're reminded of 'Treasure Planet' at times) and is well voiced by Cloris Leachman in the American dub.
The English voice cast acquit themselves well for the most part, actually. However something started going pear-shaped for me about this movie by about the halfway mark. I think the best way that I could describe it is that the characters get swallowed up by the vast scope of the story. I'll come back to that later.
There is so much to admire about Laputa, and so many people obviously love it, that I almost feel mean for only giving it 8 out of 10, but for me the operative word here is 'admire'. It was more impressive than personally affecting, and at over two hours it just started to drag.
The crucial thing for me was this: I really found that I didn't care much about any of the characters. Disney would have taken the care to develop the characters, make you really fall for them, rather than leave them as relatively two-dimensional pieces to be moved around while you gawked at the amazing vistas in the movie. Even that would have been tolerable if there was some hard SF in the story to make up for it, but it was basically a lot of gobledegook about Princesses and magic crystals. That's where Laputa falls down as far as I'm concerned, and that's what holds it back from being a potential 10 out of 10 movie. Having said that, it must be admitted that Miyazaki was leagues ahead of Disney in general in 1986, when you consider that their movie of the same year was the pretty dire 'Great Mouse Detective'.
Laputa is a good film in some ways an amazing film, and you should definitely see it, but I do feel it's over-rated. I definitely prefer the earlier 'Nausicaa of the Valley of the Wind'.
BTW, if you manage to watch them in chronological order, watch for the fox-squirrel from Nausicaa popping up briefly in Laputa.

Stephen J. Cannell apparently decided a few years ago that he would broaden his horizons and dabble in horror. The result, "Dead Above Ground", is an abysmal piece of junk. Now, had I noticed his name in association with THIS particular film I'd have put it back but no, I didn't have my glasses on and therefore I missed it, damn, I really do need to bring those with me while video shopping. First question would be, who the heck is the target audience for this? It's almost like a "scary" kids movie, but then again there's topless babes and some gore and some bad words spouted here and there. The main characters are so cute that you want to see someone, anyone, go after them with farm implements of SOME kind. Seems that a guy opens a bed and breakfast that has a checkered past, a child-murdering witch that collected children's teeth lived there. Probably something the real estate agent failed to mention. Of course now in the modern day there's a little girls ghost around to warn the real-live little girl that now lives there that something bad is going to happen. It does, and there's also two Bubbas that were squatting on that property when the new owner took over so they're out for revenge too. This whole thing has the feel of some made-for-cable junk that's for the kids at Halloween except for, of course, the things that aren't suitable for little kids, so not only is this mediocre, it's confused, too. A big boo and hiss to Anchor Bay for putting this out too, considering their usual track record with fine releases this is a new low. The UK gets a Phantasm Box Set, we get "The Tooth Fairy". Hardly seems fair. 1 out of 10, absolute garbage.