I am in agreement with others who have upgraded. The best things are the new screen and the improved button layout. The page turns are very natural now and having the number buttons next to the numbers on the menu is much more intuative. The faster refresh is noticable but not a very big deal.
I would not have upgraded if not for my 500 screen failing one year and one week after I registered it. Now that I have I am very pleased with the 505.
-Greg
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