I am using this handset for last 6months and I find that its a good mobile. It has both Touch and QWERTY which makes it very easy to use.
Positives:
Touch plus QWERTY
Android 2.3.4
Document viewer
Acrobat files can be viewed.
Processor speed is ok.
Negatives:
No button to receive/end call.
Single SIM(Samsung has launched a new mobile in the same price range with dual SIM)
No trackpad
Battery life is not that great
No document editor
AND.
You can NOT forward the SMS you receive. I find this extremely annoying.
Some apps on Android market are not supported on this handset.