This one's from the extraordinary visual imagination of Luc Besson; you might remember him: the chap who brought us the brilliant Fifth Element many many years ago? So if nothing else, Valerian and the City of the Thousand Planets would be a treat for the eyes. And it was a treat for the eyes; unfortunately, it was pretty much nothing else.
Okay, in terms of scope, artwork, imagination and attention to detail, then this is something of a masterpiece, especially when you think that the movie was made outside of Hollywood. The scenery is breathtaking, the aliens are inspired (though some of them did look as if they'd been recycled from the Fifth Element). If that sort of thing floats your boat (it certainly floats mine) then it's well worth the rather drawn-out two hours and fifteen minutes you'll have to spare to sit through it. But in terms of storyline, script and performance then I'm afraid it misses its mark by a good light year.
The main problem with the film is that while it was concentrating so hard on being the movie equivalent of a catwalk model, it sort of forgot what it was trying to be; it blended action scenes, bits of history with a rambling and uninspired love story.