I've been a Mindmeister subscriber for a few years and a "Business" level subscriber since we started work on TapCellar for iOS. It's one of my favorite collaboration tools because multiple people can work on the same map and the integrated task management is nice when you share a deadline.
This is an extraordinary deal. Mindmeister is normally $120 per year for a "Pro" account so $35 for two years is a huge savings. This deal ends tonight.
By way of @Zettt