I tried Strum 1 when Cakewalk first bundled it with Sonar, I thought it was junk. It refused to play the notes I put on the MIDI track but instead seemed to want to interpret them with not very good results. I guess I just never got the UI.
I was working on a track tonight that needed a fake acoustic guitar part buried in the mix. I wasn't getting the sound I wanted so I decided to give Strum another shot. I loaded an instance of the newish Strum 2 and pointed my MIDI track at it and lo and behold it played exactly what was on the track and sounded like an acoustic guitar. Perfect.
The next time I need an acoustic guitar sound, I'll probably grab Strum first instead of last. The new version is a huge improvement.