I will use it when there is a song with a full mix. I always run the piezo into my Helix. From there I use 4 paths with 4 different IR captures of a Martin D35. Those are sent via 4 outs to 4 line inputs on my interface, which generates 4 tracks in Protools. Then, those 4 tracks will be blended, grouped and assigned a VCA master. Then I repeat using a different IR of another acoustic.
I have the following acoustic guitars captured:
Martin D35
Martin 000-28
McPherson Camrielle
Taylor 816ce
Then I have some older acoustic IRs from when I used my P22 a lot. These include models by:
Collings
Lakewood
Santa Cruz
Guild
In all, it works pretty well. However, I can't iterate enough that by itself, even with the IRs and layers, the mic'd SE T60E sounds better.
I also use the HBII for any "acoustic" solos I do. My fingers are NOT acoustic fingers...they are wimpy "I've always played 9s" fingers, lol.