Sliding the i-450 upwards reveals a well spaced keypad. It changed my impression that not all sliding phones has small keypads. The keypad was responsive too.
The Samsung i-450 is constructed largely of glossy plastic, after using it for almost a month, I find the phone gets dirty easily especially with thumb prints. I believe most phones using the same material(like my Dopod D810) has the same issue.
The phone measures only 17.8 mm thick and weights only 114g, making it very light and a well designed device.
The Samsung i-450 is equipped with a 2.4″ 256K color display with QVGA resolution. The back light is good enough that you can use the phone in dark areas.
Powered by Symbian 9.2 OS, S60 3rd edition(Feature Pack 1), this phone offers one of the latest S60 interface. Navigation is user friendly as I could easily locate a certain menu or setting. Telling you the truth, I tried many times to make this phone hang since in most cases, most of the latest Symbian OS suffers from stability issues, but this one is just too good.
I was getting bored with the S60 used on Nokia smartphones, but with the nice icons and interface on this phone, Samsung made the right choice.