I was looking for a simple effective task lamp that would accept a medium-base LED bulb (that is, the standard, universal E26 / E27 Edison base). Now that I can get high-lumen LEDs with a variety of hues / color settings, all I needed was a lamp that could accept such a bulb. The next thing I wanted was a light I could turn on and off easily and quickly (that is, not fumbling for a switch attached to the cord). This lamp fits the bill perfectly. I am now purchasing my third lamp for a 3rd task table. Yes, the base hinge has zero mobility but that's not been a problem--I just pull the lamp where I need to. If need be, I can quickly reposition the rest of the arm (and quickly twist-to-retighten the two controls at the joints), and I'm good to work. No bells and whistles; just a quick, simple, reliable task lamp that allows me to choose my own specific brand of lighting, and get back to work.UPDATE DECEMBER 2019: I am now purchasing a 4th lamp. The 3 previous lamps I purchased have stood the test of time. Still overall a 5-star rating for absolute reliability and ease of use.ONE CLARIFICATION ABOUT THE BASE: the base is actually quite weighty and sturdy. As long as the set screw remains screwed into place at the bottom of the lamp, the lamp will not tip over. (The set screw prevents the lamp apparatus from rotating freely and independently while the base itself stays in position. With the set screw in place, if I want to rotate the lamp, I need to rotate both the base and the lamp at the same time. I see this as such a minor, occasional problem it is hardly worth mentioning except that other commenters have said that this is a major inconvenience for them.)