Hello:
After about a month on WM5 on my hx2755, I found a couple of positive things about the upgrade, aside from persistent storage:
1- I can use MS Voice command with Bluetooth and not get the memory error.
2- Wireless seems to be more stable, before mine used to keep on disconnecting, and if I tried to turn off/on had the unrecognized card error. Now I have not seen it, altought if it happens only occassionally it wouldn't be that bad.
I decided to stay with WM5 for now, since the programs I use most are working fine, although there were some I could not install. :(
I am aware of the problems of WM5 like battery draining, problems installing and lockups, but most of the time I have realized that a third party program has been the cause. As developers continue updating their programs this can help, but also an update for WM5 from HP would also help, as it did in WM2003SE for problems before.