Played this game pre-steam release quite a bit. It was pretty clunky and rough at first, I wont lie, but Ben has added quite a few nice improvements and made the game feel a lot smoother to play. This review covers early alpha stages, up to initial release on Steam.
One of my favourite parts of Sky Nations is that you can craft your own equipment. This is hats, arms, gloves, feet, helm, pants and chest. You can be quite creative with what you create, and it helps add a bit of personality to your character. Unfortunately it's limited to a server basis, so you'd need to create it on each server after gathering the proper materials.
For people saying it should be a Minecraft mod:
Don't base it off of Minecraft. Yes, it has a similar style, but a lot of games do that. This one does it well though, and doesn't attempt a lazy rip-off of a successful game. Ben tried to do something new with the genre, and it's sort of a mix between Guns of Icarus and Minecraft. Everything in Sky Nations would be really, really hard to replicate in Minecraft, and making it it's own game was a much better solution in the long run, as it's way more flexible than it would've been. Sure, Minecraft has it's extensive mods available that do change quite a bit of the base gameplay, but there would always be limitations to what you could achieve through that.
The combat in the game is fun and quite challenging. Are you ready to risk everything you've put into your ship so you can possibly score some loot? Maybe you and a few friends discovered someone's base, and need to try and get through their turrets. Be creative, and work together to become better.
In addition to all of this - the developer actually does participate and communicate quite often with the community. He's done an outstanding job with the game so far, and watching it grow from being v0.145 almost a year ago to what it is now is quite impressive, and he shows how dedicated he is to making the game.
I do hope to see the game continue to grow, and more players picking it up, offering suggestions and feedback and helping the game. Please remember that this game is currently still Early Access, and in Alpha stages still, so there is still a lot of content that needs to be added or improved.