To be fair, our drummer ordered these because he’d been listening to Rush and Pink Floyd (think Red Barchetta and Time) and while they did the job admirably, the quality wasn’t up to that of his current kit, but nonetheless they enabled him to achieve the sound he’d/we’d been looking for.
To sum up, made for a price but did the job that was required…heads might need replaced sooner than normal drums, but still, worth the money.