At risk of being devil's advocate here... I had the MB pre for a while, and enjoyed its basic tone however moved it on as I hated the way it clipped.
Being a tube pre I assumed it'd compress and slightly break up as you'd expect from tube gear (without the drive on that is) however it seemed to have more of a digital clipping quality to it that was just awful.
The logical thing to do was turn the gain down - but that felt like it lost headroom, and I use some loud effects before the pre that would have a similar result.
Better players than me have used this to great effect though so of course YMMV.
Ive been on a bit of a DI/preamp journey over the past year or so - Laney Digbeth, Sansamp VTDI, Source Audio Zio bass preamp, Joyo Tidal Wave, Joyo Monomyth, Ampeg SGT DI, HX Stomp, Ampero II Stomp, Mark Bass Vintage pre and more... but landed on the Aguilar Tone Hammer V1. Versatile as you like, has a lovely core tone and a really quality bit of kit. For me it'd be a toss up between this or the laney digbeth 👍