V-Tone Acoustic ADI21 : A very affordable preamp for gigging

Let me start by saying that this is definitely not a Baggs PADI. Let me also say that it costs about 1/10 of the PADI's price. Generally speaking it will tame the "quack" associated with USTs (under-saddle transducers). The sweepable mids are a great feature especially considering the price and besides EQing that control can also be used to kill any feedback that you might be getting. The blend knob should be used with caution as a little goes a long way and you can easily get valve-like distortion out of it (useful for electric guitar though). Overall a nice product for the price, make sure you invest in an AC adapter as it can't be powered by phantom power and it can eat through batteries relatively easy. A plus is that it can double as an active DI box.