I was once quite interested in it, but after knowing the cinebench r10 score of the E450 is slower than my overclocked atom 330, I've dropped the idea.
You may like to check the same form factored NP300U1A which use i3 processor. Seen it on 1st floor of MKCC, there is also a 'water good' as advertised in www.price.com.hk. Warn you international reviews say the battery life sucks.
I bought the e450 version. The battery really is not too good, only able to last around 2 hours, must less than i expected. It's only advantage is its light weight.