I am quite happy with the lens and I no problem taking it with me on trips. It's very light, well built, although a bit large compared to my kit lens that came with the Panasonic G1, but not by much. Remember this is the lowest end and the cheapest lens the manufacturer can make as a kit lens. Other than the original kit lens that came with the Rebel 300D, I have had good experiences with kit lenses that came many of the camera bodies I have bought over the years. They are optically getting better while built materials getting cheaper (except the Sony NEX, which has metal mount and lens barrel). For any better quality lenses, you would have to fork out quite a bit more money for slightly better image quality. The majority of NEX users will find the lens more than satisfactory in most cases, except low light use.
Subway Station -- NEX-5 & 18-55mm kit lens.