Wow, I didn't know that my simple post will generate such a response.
Hi Bilbo, I know you are entitle to your own opinion, but asking me to "heading back to school" just because I value the dictionary feature is a little bit rude.
FYI, I have 2 master degree in engineering (but not a English major) and English is my second language. I bought a Sony PRS-600 because I wanted to encourage myself to read more and help to improve my English. The dictionary feature on PRS-600 is very accessible and this itself make it different from Nook and Kindle (or Kindle DX).