Installed earlier this morning, and it has transformed my PW4 from a device I love into....a device I love. :-) No problems with the install.

Agree with you, from just a few minutes of use and quickly clicking through generic and book-specific settings, I haven't noticed any changes yet.

One minor detail: I think they have updated the PW User's guide. I already had the latest one installed previously, but they just downloaded "5th edition." Sadly, won't have time to read through the owner's manual this morning to see what new and exciting details we have in there. :-)