No one has really answered the question of what are rangefinders good for. Really anything in general photography, other than macro work, where the parallax problem becomes serious. They tend to be quite a bit lighter than SLRs so are easy to carry for long periods, which helps with landscape work and they are less noisy and conspicuous than an SLR which makes them great for candid people shots and street photography. There is no mirror shock, so they are easier to hand hold at low shutter speeds in low light. They can also be easier to focus in low light, although I notice that some people don't agree. Finally, lens designs can be simpler, especially wide angles, as there is no need for retrofocus systems to keep the rear element clear of a moving mirror, so the lenses can be less compromised and so sharper.