Summary: When I bought my first Panasonic G5 body from Amazon, it was (oddly...;-) $2 cheaper with the Panasonic 14-42mm G Vario lens than it was without it! So, it made perfect sense to get the lens. I had read several less-than-enthusiastic reviews of it, and had seen some samples of photos shot with it that did not inspire confidence, but I figured I could easily sell it cheap if it was too poor.
Summary: Tiny, easy to carry around, super fast slilent auto-focus, and Mega OIS image stabilization does help a great deal in low light situations. Image quality is very good considering it's price and zoom range. Shoot in RAW to extract full potential of the micro 4/3 camera. If you shoot JPG, image will always come out blurry. If you always shoot in low light and high ISO, image will always come out blurry due to noise reduction image processing of the JPG engine.
Summary: When I purchased my GH2, I thought that it would be a good idea to purchase a camera that had a simple lens. I wanted something to get started as most people do. In retrospect, I would have been much better off buying the body only, and purchasing an aftermarket lens. I wasn't expecting huge quality, however I was expecting the lens to function at the lowest level, allowing me to focus and zoom. Big assumption!
Summary: NIce lightweight kit lens that has the image stabilazation built in. I have tried this one and the Olympus 14 42 (old and newer R) and like this one better. It is a bit bigger but having the stabilization in the lens is worth it to me, since I use both Olympus and Panasonic cameras. My real favorite is the Panasonic 14 45 OIS lens, which has a much better build quality and longer reach.
Summary: Pros: 28-84mm focal length in 35mm equivalent with Pan 2x crop factor, OIS, great shallow depth of field Cons: very hard to zoom, not consistent, makes mechanical cracking noise, seems like my GX1 need lower F stop or wider Aperture in low light to compensate digital noise in videos... why it's not 12-60mm, at least 5x optical zoom!? Panasonic Point & Shoot cameras Leica lenses are better with 12x, 16x, 20x and 24x optical power zoom... and cheaper...
Summary: I bought one of these and had bad luck.. it was very sticky/jerky trying to zoom in and out; probably just a bad one, but I also noticed that it sort of felt cheap. I ended up paying more for a Lumix Vario 14-45mm and was amazed at the higher quality and advanced features with the OIS control, etc. Not sure if the image quality is any different, but...
Summary: Bought this lens for my Panasonic Lumix GX1. I have 4 lenses for the camera: Sigma 19mm F2.8, Sigma 30mm F2.8, Olympus 40-150 'R' version. Optically the three other lenses are superior to this one. But as a kit lens and for the price (I bought it for $89 used), I won't complain anything. It is not as sharp or contrasty as the 2 primes or the telephoto lens, but it is probably the most useful lens when you walk around the city snapping away.
Summary: I received this lens as part of a GF5 kit. Before purchasing the kit I was aware of its reputation of not being a stellar lens and yet I have still been disappointed. For several years I managed a professional photography store and tested many kit zoom lens. The Panasonic 14-42mm is one of the weakest performing kit lenses I've shot and it comes as no surprise to me that Panasonic is replacing the 14-42mm kit lens for their 2013 cameras.