Why would anyone want Dverb? It's workable, but if i had a choice I'd rather have something else. It's my only reverb plug-in atm, and it's painful, but it's all i've got. There are alot of great free vst's that sound way better. The only reason i would seek it out is for that 80's sound.
D verb sounds good on drums because its high end is so shitty. It makes the verb stick out without having to have the levels too high. It reallyyyyyyy only works for metal IMO but it can be excellent for that.