The O2 XDA Guide looks like a pretty good device although not at the top of the high end devices. 4WinMobile has a very detailed and comprehensive review of the O2 XDA Guide and it's definitely worth the read.
"The machine is perhaps not quite as well constructed as the higher end devices with the odd creak from the back-cover and it lacks such luxuries as a VGA screen or accelerometer. However, it could be argued that, whilst nice to haves, these are more about appearances whilst the guide is all about getting out and about and getting things done with it's A-GPS, HSDPA, fast processor and abundance of memory. The screen is bright and clear, the battery - whilst not outstanding - gives a full days hard use and you can just about eake out a weekend if you're very careful and the tiny size lends itself well to being used one-handed with a 3rd party SIP such as Resco's Keyboard."
Click the link below for the full review.
"The machine is perhaps not quite as well constructed as the higher end devices with the odd creak from the back-cover and it lacks such luxuries as a VGA screen or accelerometer. However, it could be argued that, whilst nice to haves, these are more about appearances whilst the guide is all about getting out and about and getting things done with it's A-GPS, HSDPA, fast processor and abundance of memory. The screen is bright and clear, the battery - whilst not outstanding - gives a full days hard use and you can just about eake out a weekend if you're very careful and the tiny size lends itself well to being used one-handed with a 3rd party SIP such as Resco's Keyboard."
Click the link below for the full review.