A couple of days? OK. Reykjavic is good for 2 or 3. Decent nightlife. I wouldn't go except Jun.-Aug. I recently spent a week there. I did it all wrong, and still had a pretty good time. In general, food, lodging, car rental, etc., is VERY expensive in US$. There is not much special about the cities there, but the natural beauty is incredible. If I could do it again.... I would rent a 4X4 Toyota 4 runner or similar, and spend about 2 weeks camping all around the country. Staying away from the cities, cooking my own food etc. Very worthwhile destination, but not if you're just staying in Reykjavik and doing day trips.