Verbs are my first reverb attempts. These freebies are unusual in several ways: first, they’re a lot like a complicated multiple-echo system with very little allpassing. Second, since they’re dual mono they’ll widen ambience since hard panned stereo sends automatically get a hard-panned return. Third, they’re set up so that you pick a different one to vary the reverb size: this is to avoid allocating huge delay buffers if you’re not using them.
They’re free and extend from very short delays to colossal huge ones. You might try using this to expand on another, denser reverb! Or just treat ’em as a more ‘delay-like’ verb.