I also use it in my mixing work for guitars and vocals. On acoustic guitar I use 3 taps (Logic Delay Designer), with one tap panned left, -45, the other right, +45, and one in the center. The guitar will be panned either right or left, maybe around +/-30. The 3 delay times are from the Fibonacci sequence, with the longest one opposite the dry guitar, the shortest in the middle and the middle on the same side as the guitar. Because I'm using lower numbers, it's more of an ambient thing, but it really opens up the guitar in the track in a different way than room reverb, but similar. You have to use just the right amount, so you don't get a slap effect. Similar concept with vocals. There... I've told one of my big secrets.