Up until last night, my XA1 was poorly operating with FW 2.0. Some of the problems included skipping, stuttering, ramdom power-off's, and intermittent lip-sync issues. To complicate matters, the player would not update via Ethernet or Disk, to later firmware versions.
After getting RMA authorization from Toshiba, I sent the player in and waited, and waited, and waited.
Got it back last night (thanks FedEx) and watched Transformers. Not a problem encountered!
I will play with the features to see what 2.3 has added. Since I have been at 2.0 since the initial release I anticipate a noticeable difference.