We had the best weather, we were very lucky to be able to see the Nothern lights in weeks before and days after.
Nothing was cancelled for us due to bad weather, and our guide made sure this happened as he pushed us all to see everything on time and some things ahead of schedule. The hotels we stayed on, where nice, no issues and the tours and buses where always on time.
The people are always helpful eventhough not all very friendly, but you get used to their moods as they are not rude. I recommend this tour 100%, is full of amazing natural sites and the guides make it full with very interesting notes.