We were in finland (rovaniemi and Lapland region) for a total of 8 nights in March 2016. We went via various tour operators to see the auroras, but no luck. On the very last night, we chanced upon a flier from this company in our hotel. We decided to take our chance and booked with them.
We were pleasantly surprised. We were taken to a little school in the outskirts of Rovainemi. From there we climed a small hill and we were lucky to see the best sighting ever. We were very very lucky. Also the guide Anthony, was very good. He was passionate about the auroras and knew every single detail.
He helped us with our camera settings too. (which is very important)
I strongly recommend everyone to go through this company for a great experience.