Letterkenny is the largest town in Donegal, and Donegal football is the thing that matters here. The county's home championship games are played at MacCumhaill Park in Ballybofey, a short run down the road, and an Ulster championship day involving Donegal empties the town. Finn Harps, also in Ballybofey, provide the League of Ireland side that Letterkenny follows. Donegal is one of the more challenging counties for connectivity, with a lot of the county depending on the National Broadband Ireland rollout or on mobile broadband, and the terrain does the rest. That makes it one of the places where testing on your own line before paying is not a nicety but the only sensible way to decide.
Letterkenny is the commercial centre of a county that is genuinely difficult for connectivity. The town itself is reasonable, but Donegal is large, mountainous and thinly populated, and out towards Gweedore, the Rosses or up the Inishowen peninsula through Buncrana, households depend heavily on the National Broadband Ireland rollout or on mobile broadband. Terrain does the rest. The county also has an enormous number of holiday and second properties occupied irregularly, which suits a year-round contract very badly. Between the connection variability and the seasonal occupancy, Donegal is the county where testing at your own address before paying is least optional. What works in Letterkenny town tells you very little about what will work twenty miles up the coast.