I visited Fionn MacCool's last night for an event. From the outside, the place looks like a big pub but when you enter it is quite cozy. Our group was tucked away in a corner. The server was prompt and quick to serve. Food was average pub food, nothing I ate really stood out.
They do have live music on busier nights, (Thursday to Saturday) which makes it a true pubby feel.
If you are in the Clarkson area and up for a pint, stop in at Fionn MacCool's!