Well, with PENG you can have your choice, you can use your old buttons if you want or you can use the new "fancy" buttons. Also the transparency feature is GREAT.

I have been using PENG now for about 2 months and I had to go back to PE 4.05 to work on a 1000 that I just got. I must say I really like the interface on the new PENG software better.

I imagine if a person learned to use PENG first and then had to use PE 4.05, they would be saying how that they think PE 4.05 is a pain.