I just bought the Radar to use with 3 Sigma Audio acoustic impulses (for use with UB piezo and acoustic guitar piezo). I was unprepared for its EQ versatility, as many of you have mentioned. It is cheapest/smallest/most easily configurable graphic/parametric EQ + HPF/LPF preamp I’ve seen. Even without the cab sims active, the EQ options are killer! (The sweepable graphic EQ frequencies...) Not sure about tone ‘quality’ with regards to AD/DA and IR sample length but it sounds better than when I’m NOT using it, so at the moment I’m sold.