I have not seen a particular slowdown after 6 months of use, the same goes for the battery, knowing that I have to use 1h / 1:30 each day.
In the end, I still regret two things:
1. the 16GB version without the SD card should not even exist in my opinion ... there is already a few GB dedicated to the OS, and it's very little we limit put some games and some series in HD.
2. I would have preferred the larger tablet, around 9 inches.
It not stop me put 5 stars in the sense that it regrets that I could provide and the product itself is really excellent, I think there is no better on the market shelves.