I appreciated your help and suggestions.
I bought mine almost a year ago when I was learning synth, as I wanted to learn to make some 80's electronic music.
On one of my synths -the Korg Radias- there is a sequencer but it is step based and hated it because I am a musician and not a programmer. After a little research, I read a lot of happy users and bought one. When I started using it to learn some songs I was after, I discovered how easy and musician oriented it is.
Then I started writing prog rock music and thought to use it because of its simplicity. On the other hand, I use Logic Pro 9 and hate to set up midi hardware for external devices. On the MMT-8 I just plug and play/record!
Also using virtual instruments is OK when I compose, but their sound is dull to my ear and the virtual instruments drag too many resources slowing the system down for live activity.
Finally, I love the idea "one object, one function". Computers are too many things at once, which is very distractive to me and too virtual, as they don't look and feel like musical instruments in my hands.