Recently I had a longer talk with Motorola about their MPx220 Smartphone and some problems I've figured out with the engineering sample I got. For instance the stand-by time became dramatically shorter with the last ROM versions and also the external display was too dark in my humble opinion.
The reason, why the battery drained that fast - compared with earlier ROMs I've tested - is because the latest ROM builds (and the one which will be commercially released) are designed and optimized for the final hardware, which isn't the same which was used for the pre-production engineering samples. While I had around 1 day stand-by at first, it went down to around 6 hours only. Now, with the final hardware, the current stand-by is up to around 2 - 3 days while the ROM still contains some debugger software which reduces the stand-by as well and which is - for sure - removed in the commercial version.
So if you buy/bought a pre-production device, and you will manage it to get the commercial ROM for it, be aware that your battery time will be something around 6 hours only, while the commercial version is expected to work at least 3 days or so.
Another thing is the external display which was pretty dark and not that useful to use it as a view finder for self-portrait camera shots and more or less completely useless to use in bright environments, like on the street. Also this display design is changed and now you can see the caller ID, even outside in the bright sun!
Conclusion: Motorola hadn't only improved the software but also the hardware and the latest software will not work that good with the previous hardware anymore but great with the final device. Therefore my clear advice is to keep the hands off from pre-production units, doesn't matter how alluring it is.
On the other hand, the final Motorola MPx220 will become a great device, even better than expected and it's worth to wait for!
Cheers ~ Arne