It was highly anticipated as this was the first time Big Finish were able to use modern Doctors and companions and very few stories feature a story arc across so many Doctors.
Unfortunately, AudioGO went into administration before it could finish the set and while Big Finish tried to make it available, physical sets were very limited and sold out quickly.
Good news! Big Finish have recently announced that this set is now available again, complete with the previously exclusive Meeting Destiny behind-the-scenes documentary. You can order it here for £25 download or £30 for the CD + Download.