The cottage address is:

Ysbytty
Llwyndafydd
Llandysul
Ceredigion
Wales
SA44 6LF

Most SatNav systems which accept postcodes will get you very close indeed.

The co-ordinates are
Latitude:    52.174957
Longitude:    -4.3901417

The Landranger reference is SN366556

If all else fails the cottage is the third property on the right on the road from Llwyndafydd to Cwmtydu.
Ysbytty - Self Catering Welsh Holiday Cottage