I tried the Harley Benton when I was looking for a pedal board preamp. The eq and drive were really useful, the compressor wasn’t really that great (but still useful at certain settings) but my passive basses kept overdriving the input stage so I returned it. Admittedly I play really hard, and have fairly hot pickups, but nothing that any other pedal pre (sansamp, MXR etc) hasn’t been able to deal with.
Eventually I went for a second hand Dave Hall VT1 eq and love it; line in, headphone, 1/4 and xlr outs with a separate level control for each.