Just what I was looking for!
Unbelievable! I first purchased the Boss 'VE 20 for my vocal processor and I loved it for it's sound and capability. The only problem was, I needed to change the key manually for harmony parts, which was a real drag. Then I discovered the VE 8, which does auto key detection from my acoustic guitar. Suddenly, my performance became much less complicated.
The added bonus is that this is also a guitar processing unit, offering resonance enhancements making my acoustic sound awesome. It also has a multitude of both vocal and guitar effects as only Boss can do. VERY satisfied with this purchase.