What is your opinion of this product?
The R144 works fine on my acoustic guitar and voice. I'm positive it will be just as good on my guitar amps. What keeps me from giving a full 5 stars is that the chrome looking bracket on the mesh grill is plastic (I think). But - the mic isn't purple, it's more of a dark bluish-purple, which is a relief, as purple looks cheap when it comes to microphones. For the price, you get a nice plastic box/case, a polishing cloth, the mic and a shock mount with extra bands. The R144 is larger than my AT2020 which is another bonus.