My trial of version 3.1 has just finished, so I downloaded version 5 to see what has changed.
The settings interface is a big improvement, but there are two bugs that I've found which have annoyed me. Also, in version 3.1 I had nice small icons on the Today screen. In version 5 the icons are huge! Too big!
Bugs:
- When I click a profile icon, then choose a time, the click goes through the time button to the today item behind it. The profile is chosen OK, but I then have to close (for example) the Bluetooth setting dialog. Grrr!
- Last night I was browsing my offline IE favourites. As normal, every time I opened a stored page, the XDA2 tried to connect GPRS to check the page version. As normal I clicked the 'cancel' button to stop the GPRS connecting, but every time I did this, the machine turned itself off. I discovered this is because I had chosen a Phone Profile (default Silent) with the setting to turn the machine off after every call. This was a major pain in the ass.

If this setting is going to cause the machine to switch off like this then I'm never going to use it - it's a wasted setting.
At the moment, Version 5 has disadvantages for me. It's not a step backwards, because the settings interface is improved a lot, but I'm not going to use the program any more. This is a pity - Version 3.1 was excellent!
Hope this helps.
Edit: More bugs? I just set the 'Loudest' profile to 'Vibrate: longer' on incoming calls. Wow. It was definitely longer. It wouldn't stop, even 30 seconds after the phone had passed the call to answerphone. I had to switch it off and back on to stop the vibration. Great.

Also on loudest profile, with SMS set to 'Sound: normal' and 'Vibrate: normal', I get no vibration or sound at all when an SMS comes in.
Also also

, I can't configure MSN Messenger alerts independently, which I could in V 3.1.
Damn, my disappointment level is rising!