I bought a set of these along with a set of e-drums as I expected the sticks included with the drums to be a bit lightweight.
These sticks proved to feel a lot more "dense" and higher quality than those included with the e-drum kit. Those included with the e-drums felt unfinished and prone to splintering where these have a satin finish which feels a lot more pleasant in the hand, yet doesn't slip.
After using them quite extensively (with a rubber head / plastic cymbal e-drum kit) for well over a year, they still look and feel as good as they did when I received them - playing (or at least trying to play) thrash metal, I do tend to use them to hit quite hard so it isn't as though I've been treating them with kid gloves.
Of course one would reasonably expect much, much more wear and tear if used with a metal rimmed / metal cymbal acoustic kit and they would need to be replaced in a fraction of the time, but they'll probably last forever with an e-drum kit. Though for the price, it certainly wouldn't cause any pain to have to buy another set (or five).
Overall, I don't think that one could reasonably expect any more from a set of sticks. For this price they're a phenomenal bargain!