Are expensive corded jigsaws worth it over budget models?

High-trust woodworking community threads are blunt about this: a quality 7-amp corded saw from a name brand is described as 'night and day' versus a sub-$50 unit, particularly for blade tracking and reduced vibration. Budget saws earn praise for light DIY and occasional use, but reviewers repeatedly flag blade 'walking' and difficulty making clean straight cuts on the cheapest models.