The built-in camera has not convinced me. Without autofocus many images are blurred in non-optimal lighting conditions and QR codes can be read very badly. While a tablet is not a substitute for a camera, but a snapshot here and there should be enough already.
The major negative aspect is the permanently installed battery for me. The battery life is when the Wi-Fi / 3G with just under three hours is very short and you can then use no second battery.
From experience I know that batteries subside gradually in the performances and in frequent use often after only two years are over. One can indeed on the Internet for a replacement battery and the necessary tools relatively inexpensive and of replacement by yourself, but but there needs a certain level of technical skill. When this has not, then the only solution on the Samsung customer service. This is not just cost and it will certainly consider whether the investment is worth it or not but equal to a new tablet purchased many customers. Since I am not prepared to put every few years about 100 in the battery exchange or over 200 in a new device, I sent the tablet back.