I have the R-Delay, it can do just about anything from subtle to outrageous. Can make a vocal track sound great or totally muddy it up.. dialing in (tweaking) is somewhat sensitive particularly if you want a subtle effect for vocals whilst maintaining clarity, intelligibility and feel. I like to bump-up the R-Delay effects in short-parts of a song using automation. Have not tried R-Delay on 'rhythmic instruments' yet, I guess it would be very interesting and useful in that regard for example, listen to Audio Demo: Groove Delay - Title 2.
Think I got that AMOD, but have not installed/used it yet. Thanks for the reminder.