I have have a  Garmin nuvi 255W 4.3-Inch Widescreen Portable GPS Navigator  however , the power cable that come with the unit from the factory in the last few week before I get this amazonbasic model have be act weird . the old power supply do not work right 100 % of the time , that could be from a couple of year of in\/out - in\/out in the power adapter slot . anyways , the timing of this AmazonBasics unit be fortuitous . I pick one of these amazonbasic power cord up , and it work perfectly . this be one of those device where it be hard to do a `` big '' review , because it either work or it do not . this work . a few cosmetic difference between this and the factory model be all I can talk about , really . 1 -rrb- the AmazonBasics unit have a smaller cord than the factory unit . inside a car , this should be a non issue , but it do have a somewhat smaller cord . 2 -rrb- the blue power light on the AmazonBasics unit be MUCH brighter than the red light that be on my factory unit . these be both very minor nit , the thing work great , and if you need one of these for you Nuvi , I would say go for it .