GPS wireless fence vs. buried in-ground wire—which is more reliable?

Across reviewers, buried in-ground wire is still regarded as the most precise and consistent boundary because the signal follows an exact physical perimeter, at the cost of installation labor. GPS collars are praised for fast setup and custom-shaped boundaries but several community posts cite accuracy drift of roughly 10–50 feet and weaker performance under heavy tree cover or poor cellular signal. Plug-in wireless transmitters sit in between: easy setup but a fixed circular zone.