In SWtoR, there are four primary armour types: light, medium, heavy and adaptive. Adaptive is special in that it is automatically the heaviest that your class can use. That is, if you're a Consular/Inquisitor, it is light, if you're a Vanguard/Juggernaught, it is heavy, and so on.
Once upon a time, before adaptive armour, all custom armour sets such as those purchased from social vendors had a specific armour type, which limited their usefulness. So you wouldn't see a (viable) juggernaught tanking while wearing Leia's slave armour, for example. Adaptive was added so that these custom sets could be worn by and useful for everybody, with the exception of some male/female-specific sets, which are only appropriate for characters of the respective gender.
The pilot's armour you link is a custom armour set that is a thank-you from the devs for being a subscriber during the Galactic Starfighter beta. Like any other adaptive armour, its armour type will be the highest you can use (if I read correctly in this case, that would be heavy), but it grants NO bonuses during starfighter combat; you can just wear it during normal play. That said, just like any other armour set, it's as good as the armouring and mods you put in it.