It's expensive and yes, portions are generally small. Lunch is more affordable, but still not cheap. As a slightly cheaper alternative I would recommend the Triskel cafe, which unfortunately is not open at nght.
However, the food is great. In particular, the desserts are superb. Great (and pricey) wine list too. Some dishes are quite hearty, e.g. pasta dishes (but not ravioli or any stuffed pasta) or tortilla.
To sum up, I think it's a really special place with great food, but slightly overpriced. It's the best restaurant in Cork, with the possible exception of the Ivory Tower, which with its predilection for serving up small fowl still oozing blood,not a veggie-friendly option.
Enjoy.