Costco has this item, the Wolverine PicPac 160GB Portable Digital Pictures & Data Storage,,, for $189.99... my question is this,,, how many of you have ever used this, and how does it work for you? ive heard of these devices before, but i think they were all in the $500-$1000 range... is it convenient? easy? fast to semi fast? if it does, then i wont have to drag my laptop with me on vacation... thanks in advance for your help!