Blindfold chesssua

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Lactobacilo

Hey I'm new to blindfold chess and I've been playing a few games against computer hard 10-10 with blindfold pieces. Although I do pretty well up to move 18. It gets hard to keep track of everything afterwards. I can remember most pieces position but I can't visualize the whole board, so this is basically a question to anyone who plays blindfold. 

Can you visualize the whole board easily?
Do you struggle to remember the pieces position?

Do you sometimes forget a piece was occupying a square?
How is you blindfold experience in general? 

edit - 

Please don't mind the 'chessua' at the title, that's a typo.