We had an ensuite double room - and it was TINY with dated decor. Very little comfort there. Bed was soft and unsupportive which may suit some backs but not ours. There is extremely little space in the room which proved tricky for us who'd travelled from Australia with a large suitcase each. But if the double room is small, wait to you see the shower room. If staying at Glenariff, it's simply our hope that you aren't overweight or suffer from claustrophobia.
Among the good points are the location - only a close drive to town, the hostess - marvellously helpful and customer focused, plus the breakfast. Good choices there. Full Irish or maybe just a continental. You could have 'more of that and less of that' too, for example. Really nice and tasty. Fresh fruit also available.
If you don't have any back issues, we could recommend the double room for one person, one night.