Summary: A great upgrade over the 20-50mm lens! Very quick focus, sharp images, and the image stabilization is fantastic as well. It is physically larger than the 20-50mm, but it's well worth it. Not a whole lot else needs to be said, this guy is excellent.
Summary: Replacing the 20-50mm kit lens that came with the NX2000 with this amazing 18-55mm zoom lens. Although this lens was also a kit lens but the size is bigger and feel more solid than the smaller 20-50mm. This lens is sharper and focus faster than the 20-50mm lens, and it won't move when autofocus.
Summary: Back with my stock NX lens, I had to brace myself for every shot (and night shots were out of the question). I'm a guy who often carries heavy stuff, so steady hands aren't my forte, BUT these solve the job perfectly. To top it all, it even came with a lens hood, saving me $10 off from ebay!
Summary: So I really cannot comment on the actual product because I used this lens for five years now. While on E trip, my camera bag fell and get the angle of the full keep the lens just at the spot weird it broke off of the body. So I needed a replacement and I chose the particular vendor based on price.