Somehow, I hadn't heard of it until recently either. Having torn through the whole thing in a weekend, I can now safely say it's one of my favourite series ever. Highest recommendation possible from me.
As for the Über edition, it's the same format as the Walking Dead & Invincible compendiums. It survived a read through for me, but I've heard of other peoples falling apart easily. For the price though, worth the risk I'd say, considering the quality of the contents and lack of OHC alternatives.