Though this phone is rather old by the time of this writing, it has astonishing capabilities that make it stand out significantly from all the other smartphones out today.
This virtue is that it can run a great variety of mobile operating systems. The user can decide, provided that he has a minimum level of common sense, what mOS is suitable, wether that may be Android 1.6 through 4.0 in all varieties as Stock, Touchwiz, Blur, Sense, you name it, there is probalby a build. Also it runs Windows Mobile 6.1 through 6.5.3 easily for the business aware user.
Finally it is capable of running Windows Phone flawlessly. Again, every version you could think of. May that be the original v7004 or up to the newest v8107 (Mango 7.5).
It is also capable of running Ubuntu and Meego, for the adventurer out there.

This gives the reason for 10 in Eco and 10 in Software. It can basicly run everything in every ecosystem.

The camera is doing a great job even though it is just 5mpx. As you should know, Megapixel is not really saying much about quality. Sensor size as well as imageprocessing does.

The display is of course not as shiny as the new AMOLED ones or the ones with 720p resolution. I find the 480x800 sufficient considering the upsides of this phone.

Finally the 1Ghz CPU is not the latest generation, so do not expect high end games like Assins Creed on Xbox Live eg to load in 50 ms. It takes a tad longer compared to mondern dual and quad cores, though simple apps such as Facebook lauch fast.