We got our hands on a Lumia 900 last week and spent a day with it, trying to use it as our primary device. Windows 7.5 is an easy OS to use, though it is different enough from Android and iOS that it does take some time to get familiar with. Before we get into the pros and cons of the device, here is a little refresher about the specs of the device:

– 4.3″ AMOLED ClearBack glass touchscreen
– 1.4 GHz processor
– 16 GB Internal Memory
– 512 MB RAM
– 4G LTE Connectivity
– 8 MP Carl Zeiss camera; 1 MP front camera
– 5.6 ounces; 2.7 inches across, 5.03 inches tall, 0.45 inches thick
– Micro SIM

This phone feels sturdy in your hands, and while it has a little more body to hold onto than a lot of phones hitting the market today, we never felt like it was too big to use. Windows 7.5 (Mango) is a beautiful Operating System, and while using it we never hit an error or lag when moving between apps. Admittedly, it would be hard to transition to from an Android or iOS device with the lack of apps, but if you were taking your first steps away from a BlackBerry or feature phone, the Lumia 900 and Windows Phone in general, would be a great place to start.

The battery life was impressive, having just made it through the day without charging it while testing it extensively, it should be no problem with normal use. The mail and messaging applications are easy to use, and concisely show your messages. It was really easy to transition from Facebook chat, to text messaging, to Windows Live Messenger without skipping a beat.

The camera software was intuitive, and the Carl Zeiss hardware fantastic. The only complaint we (and every other reviewer on the Internet apparently) had was that the actual image files seem to come out with slightly different colors than how they looked when being taken.

Long story, the Nokia hardware is good, the Windows Mango OS is good, and if Microsoft can get the droves of developers that some of the other platforms have brought to the table on board, then maybe there really can be a third competitor in the Smartphone arena.