I always keep a countryman around because tis a classic DI box. The fet can get a little gritty and the transformer is not the most hifi going, but it has a sound. When I record DI telecaster I like this box and I also sometimes like to use it with my 303s because it has a sound in pickup mode being hit really hard that's different than the non-transformed balanced hi Z input on my Eureka. Sounds good with a moog too, though more for leads than bass. For bass I tend to use the USB out on the sub phatty or use the eureka or my radial for the SE1. Anyway, everyone needs one. But remember that while it has a speaker pad that it tends to color an amp feed and I recommend a good passive DI in that role.