The idea behind me buying a tablet was
1) to use it to show photos (I am an amateur photographer),
2) to transfer just taken photos from my camera and to view them on a bigger screen,
3) and to listen to mp3s in the car or anywhere else.

1) It turned out that I can’t use it for viewing and showing photos because the screen is too dark – the contrast ratio is horrible – and if a picture has darker than medium areas they turn into black.
2) It is very heavy to carry around in addition to a heavy enough camera and lens, so not very useful for using as a storage device. Also, the image does not rotate to fit the screen – you have to change between landscape and portrait orientation manually which is fiddly and takes time.
3) And because of the problem with 3.5 jack and poor speakers its use as an mp3 player is limited either.

Well then, I though, I’d use it for reading books and for games.
But it is too heavy to hold while reading, its cooler is very loud for comfort, and unfortunately, so far I could not find any decent games for it.

To summarize – completely useless device, complete waste of money.