The string of wire/sockets and the quality of plastic is great.
The specifications listed in the website for wattage ratings though is completely inaccurate.
Jacob Henderson went above and beyond trying to get me the bulbs with the correct wattage (listed as 5 watts) but ultimately with no luck.
In styles offered; "Vintage, Starlight, and Incandescent," Vintage is 25 watts per bulb (not 5), so you'll be running 375 watts per 15 light string..
The incandescent are 11 watts per bulb (not 5), and my guess is the starlight's are at least 11 watts as well... Not sure though about those.
Beware if electricity cost is important to you. But the light string seems durable, and seems to be of high quality.