I'm planning on getting an Inspiron Duo, will it be worth it?

I really want an Inspiron Duo, because it seems really good. How much memory has it got? (e.g. 70 GBs) and if it's only a small amount then I'll get a portable hard drive. It'll help if someone who has got one answered on here. Also, is there anyplace where I could get it a bit cheaper then �500? Please help? :)