I've had the VTB-1 for a few weeks and I think it's a good value. I haven't tried it as a DI yet, but the tube blend is pretty versatile for the mic pre. It sounds as clean as the DMP3 to my ears with the tube blend off, and when the tube blend is added in, it has sort of a compression-thickening effect that works well for some sources. My only complaints is a lack of a power switch, and its design is kind of ugly, but that's a minor quip.