Pros: Great build quality, Clever folding design, folds up, good noise isolation, comfortable
Cons: Very very thick, dark sound, earpads not replaceable
Along with the summary below, I have posted a Youtube video review of the Skullcandy Navigators. If you like the video, check out my channel for more reviews :)
The Navigators have good build quality, with metals used in most parts of the headphone frame. They are lightweight and fold up into a more compact shape. The earpads are very isolating, though perhaps a little stuffy. The detachable flat cable is somewhat prone to tangling. They are comfortable headphones but I found I had to use the maximum headband size adjustment and I do not believe I have a particularly large head, so it may be worth making sure they will fit before trying them.
The Navigators have a very dark, bassy sound with rolled off highs. They have a dry note to the treble but are otherwise quite dull and mid-bassy. They are even more muffled sounding than the similarly priced Logitech UE4000. They have a signature that would, combined with the good noise isolation, work well on noisy commutes. However in most cases I found them suffocatingly dark.
Unfortunately the sound of the Navigators makes them hard to recommend unless you do a lot of travelling and like your bass. They are sadly not nearly as balanced as the quite nice Skullcandy Aviators. That said, they have a good design and are worth a look if you are after a decently priced and very portable headphone.