Sound: the sound is clear and of good quality. Since it's a small sized theorbo, it doesn't go as loud as other bigger instruments of the same kind, but the sound is very good nonetheless.
Quality: the overall quality is very good, even though you can see that the manufacturer has been quite scarce on the glue, especially on the 2nd neck. That being said, it's not a problem and the instrument is very playable out of the box (providing you spent two hours tuning it but that's just because it's a theorbo).
The strings aren't that good, they do an honest job but providing yourself with a new set of strings makes the instrument sound 10 times better. They are also quite close to each other, which can sometimes be a tad bit confusing, but once you get used to it it's not much of a problem.
Overall, very happy with the product, even though it's far from perfect, it's still amazingly good considering how cheap its price is. It especially shines when playing solo repertoire, due to the size and shape of it. Great product for beginners and budget-friendly buyers.