I live just 80 km south of Dublin, near a large town, and get appalling mobile broadband service from Vodafone. Their staff are not helpful, in fact a lot of the time they insist that the service is working when it obviously is not (I'm an ex-IT person so I do know a fair amount about the technology and the steps required to ensure that it's not a problem with laptop/modem/firewall etc.). So, even though you haven't mentioned Vodafone, just be aware from a very frustrated user of their service, that their coverage is not what they promise.