It depends upon what you're looking for. In my books, the Glo wasn't worth the money because the light and minor improvement in the technical specifications didn't justify it. Other people were absolutely in love with it because of the light, the very thing that I wouldn't pay extra for.

The Aura comes out, and I snatch one up on the day it hits the stores. The DPI and larger screen size are things that appeal to me because it is a huge improvement while reading PDF files. It is something that I was willing to pay for.

The thing is, a lot of the value in a product depends upon how a particular person uses the product. Sometimes this is objective, such as the higher DPI enhancing the readability of small text. Sometimes this is subjective, like the amount of text we want to have displayed on one page. (Just the be clear, the amount of text displayed is an objective criteria but some of us are okay with less text being displayed at one time.) Ultimately individuals have to decide if a product is worth it based upon what they want from the product. What makes sense to you may not make sense to me, and vica versa.