This is a multisampled instrument. First off, you must run this in a host such as Kontakt. Kontakt itself can be a little confusing if you little to no experience with it, but if you get a handle on Kontakt, then setting up Morpheus is a piece of cake.
The plugin comes with around 30 or more presets. They are definitely quite varied and some even are "sequenced" type effects that have an arpeggio type feel. For the most part I don't have any use for the sequence typed presets as I find them silly and unusable. The "simple" presets though are quite nice and demonstrate how much of a range this instrument has. It can sound like a warm Marimba all the way to a trash monster instrument built from scrape metal. I run this in Kontakt usually in Logic 9 or Ableton live, but sometimes as a stand alone. My Macbook pro i7 core with 8gb ram handles this instrument like it was nothing. I love mallet instruments especially for laid back "Gamelan" style electronica. The sounds that generate from Morpheus are a great fit.
What I like most about this instrument is its very realistic sound. The low are rich with lots of nice harmonics and the highs don't thin out like most other mallet plugins. It sits around less than 1gb of samples but has the character of a large sample library. I wonder if anyone has made a Midi Mallet controller, if so, this would be the first plugin I would reach for to be controlled by it. What I don't like are about 1/3 of the presets and I guess the option of "sequencing" the sound. Essentially you can hold down one note and it will play itself. I don't quite understand the need as it's enjoyable enough to play like a real instrument (i.e. you have to strike the note to hear it) or can be easily sequenced from your host DAW.
Morpheus has excellent sound quality. It is officially my go to mallet instrument at this point. I have used mainly built in plugins in Logic 9 and Ableton 8 as well as patches in various synths/keyboards. This one seems to stand above all the rest. I would definitely buy this again and recommend it to all my friends who are in need of some might fine mallet sounds.