The slow menu and quide isues were greatly improved with a software update (7.4) that came out about a month ago.

Two issues remain: fan noise and a tendency to lose it's programming data (requires a restart or a re-acquistion). The software upgrade fixed the data issue for me, but I've heard from others that it still exists, albeit at a much more infrequent rate.

According to Panasonic, they believe that there might be an interference problem that causes the receiver to lose its data. The engineer I talked to said they are working on a hardware fix for this and the fan issue. Since the fan noise is caused by airflow through the case (the fan itself is quiet), I suspect the fix may be a newly designed case cover.

I've had this receiver for about 4 months and I'm perfectly happy with it, especially since the software update.