"good value"4.0 starson by rocket7777
Pros: Good screen size. Not only that it is CHEAPER than 10" ones that are way way more bulkier to carry around.
At 10" level, some people may prefer keyboard and cheaper netbook.
Size is preference NOT value. For example iphone with junk 3.7" small screens
Cons: Screen viewing angle and brightness. I tend to use things various ways. So sometimes handheld, sometimes on table, sometimes like a picture frame, sometimes portrait etc.