In the words of Strymon:

The BigSky MX from Strymon, the next-generation reverb workstation that changesthe game for dedicated reverb pedals. It can be daunting to dramatically improve a product likethe original BigSky, as its been a staple on pro pedalboards for a long time for a host of very goodreasons, but weve spent the last four years making sure that we achieved that goal. It soundsbigger, wider and more expressive than anything else on the planet, with a host of new features andcapabilities that make it the new Greatest Of All Time reverb.