I took delivery of my DHG-HDD500 on Thursday. Read all the posts here before I ordered. Thanks for all the good info!
I did the setup Thursday night. Friday morning, time was not set, no guide data. So I changed the zipcode to another one used in the area (thanks to whoever posted that idea). When I got home last night the time was set and there was roughly 2 days of guide data.
Recording functions work as expected. PQ is as expected. The system menu and diagnostic pages had more information than expected.
Unfortunately the guide ordering is worse than expected -- ouch! You guys were very kind in your descriptions.

Only had it for a couple days, but we're off to a good start.