there are many such portable devices out there
like cs tan has mentioned, transfer speed versus battery life is important - if where you are going has a lot of power points i won't worry too much about that though..
but if say, you don't have ready access to charging facilities, then the number of transfers you can make is probably more important than speed, since from my practice i usually only transfer at the end of the day
another thing to note is if you wish to be able to preview your photographs.. for the price described above i think that particular model will not have a display, if it does i would be very surpirsed
if you plan to use it for a long long time, maybe you can check out the hard disk being used inside, and whether it is easily replaceable.
some other brands which offer this viewing feature are vosonic (what i use).. creative also has, canon and epson.. arranged more or less in terms of pricing. :bsmilie: