I already use Eventide Spring Reverb on my iPad Pro (as part of my iPad-based guitar amp/FX setup), and the recent Mac plugin sale meant I got a bargain deal on the Mac version. I’m working on some “retro-ambient guitar” tracks (influenced by 60s/70s musicians like Hank Marvin and Branko Mataja), and Eventide’s Spring Reverb nails the shimmer and twang of a vintage spring, whilst offering options beyond the physically-possible (such as long delay times). Highly recommended.