I`ve used lots of Monacor drivers and while sometimes they may come sticky from the factory (I guess freshly assembled batch) they`ve been with good quality. The pole plates do look a bit rough and I highly dislike the foam covers they put on their bass driver front side of basket but in terms of reliability and quality, they`re good. On the other side we`ve had an issue with Visaton drivers in the past - not well magnetised magnets. And the local distributor is a bit "hard" to shop from.