I urge you to actually give it a try or download the demo.
It's really nothing like borderlands outside of superficial similarities in the environments and such.
So other than the fact that it's a mission-based game with "side-quests" and a "main-story" set in a post-apocalyptic wasteland that looks very, very similar to Borderlands, it's nothing like Borderlands? I mean what exactly could the game consist of if this is true? Unless I turn it on and Carmack's face comes up and says "LOL ITS RAGEAMARI DAMACY!" and I just roll a big ball around the wasteland rolling everyone up, I'm pretty sure I know EXACTLY what the game will be. I've seen more than enough footage to know that it's just generic and not what I would expect from id after so long. If I can play it for free, then sure, but until someone I know decides to buy it then I'm left with not playing it because I refuse to spend money on something I'm fairly sure isn't any good.