I recently bought an Arc'teryx Alpha AR jacket after waiting weeks for a good offer (25%). Fast delivery within a week.

A week after buying the jacket I noticed Fjellsport had increased the discount from 25% to 32%. I reached out to customer service (chat) and within minutes I got credited the extra 7%.
Just for the record, their chat customer service is open 8am-11pm, which is extraordinary by Norwegian standards.

Greatly impressed by their customer service and good offers. Huge recommendation from me :)