I've been using version 1.0 in a few different plugin hosts in various states of up-to-date-ness.

Pros:

There's lots of great sounds in DRMR. Nearly every bank gives the user something pleasant without any additional modification. The global and per-channel controls are sensible and intuitive, and make the aforementioned adjustments easy to understand.

Cons:

DRMR has no multi-out access, nor does it allow MIDI control for any parameter. The UI, while simple to understand, is a bit out of proportion, with oversized pads that eat up the user's screen space and undersized knobs that can be difficult for some users to click accurately.

Overall:

It's quite convenient for some "set it and forget it" drum programming, but if you need to do something with complex multi-channel processing, or with automation, DRMR may not be the plugin for you.