I've been impressed with T.C. Electronics lately, and considered their Vortex flanger — but I was brought up on MXR so I've been familiar with their build quality for decades. If you were a Brit muso in the late 70s/early 80s you may remember hours of amusement in the back of vans with lame jokes like this: Customer in Guitar Store: "F. U. N. E. F. X.? German Sales Clerk: "S. V. F. MXR!"
Given I wanted a 80s flange sound to replicate some great bass lines by Derek Forbes of Simple Minds — this pedal was the way to go. Not disappointed. Time will tell if the build quality compares with T.C. Electronics but the sound is exactly right and the pedal has a very wide tonal/effect range. Once again Sweetwater (and Mike Godlove) excels in ease of service and fast delivery.