Build quality full plastic 2 out of 5 stars.
Sound quality 5 out of 5 stars, that's why it was purchased.
Battery 4 out of 5 stars.
Capacity 2 out of 5 stars.
Although the manufacturer claims it has 8GB, when connected to a computer for music transfer, the available space is only 6.84GB!
If you are not generally concerned about sound quality, buy something else that is more economical and has much more space.

I am the owner of an older version of this particular device, which is made of aluminum, and it is certain that the quality in this new version has dropped significantly. It is obvious that this version is made of plastic and is of much lower quality than the previous one. Unfortunately, this is how things are with most devices that are made nowadays, most of them are made in China and are plastic. I bought it for my daughter and I didn't want it to have Bluetooth. As a technology, it is simple, it charges relatively easily, it is very small, and it is relatively affordable. It does its job. I would suggest you to search and find something of higher quality for the same price.

I had the previous model NWZ-S764, which was much superior to this one. Its plastic casing was more sturdy and it also had Bluetooth connectivity. The current model simply has more memory and overall does not resemble a product with the same build quality. Unfortunately, it is not worth its money.

The sound level of a playlist that you have created on your computer is different if, for example, you listen to it in a car without an external amplifier. In other words, a lot of work is needed for each individual song.