I used the UltraChannel on acoustic guitars I was tracking this weekend. To be upfront, I was not expecting much if anything when I decided to try the plugin. I have been surprisingly impressed with the sound improvement after adding the plugin 'Acoustic Widening' preset and tad bit of adjustment on the compressor and EQ settings. I plan on doing more experimenting with this plugin, but you'd be a fool not to get it for free. I may be overstating the rating a bit but for what I used it for it was outstanding and the guitars sounded great just mic'ed with my Neumann TLM103.
Next up will be classical guitar, electric guitar, and some keyboards. I have high hopes for this plugin.
I got a really slow MacBook Pro from 2007 running Cubase 7.5 under 10.9.3. My first impressions were...." i need a new machine to enjoy these nice sounds....this is really sucking all my CPU" Then I found the ProTools expert youtube and at the end, the guy showed it giving a very low CPU hit. Hmmm, wonder if i'm doing something wrong? It showed high CPU use for me in Reaper as well.