We used this company to visit the Northern Lights. Unfortunately due to the weather the trip was cancelled twice but we managed to go the third night - the last night of our holiday. Sadly not the most spectacular - but we had low expectations to see the lights. It was very, very cold but you can sit on the bus to get warm and the tour guide will come and get you if there is any activity. Inga was our guide and told some tales about local culture and the lights. This can be quite a long night - we did not get back to the hotel until nearly 2 am. It was an experience and we also saw a beautiful clear sky and the milky way.
Also used this company for airport transfers - luckily first drop off when arriving. Rather odd when returning as you had to change coaches in town. But apart from this generally efficient.