Spatial Audio Raven Preamp User Experience

Looking for any user info on this preamp. There’s quite a few posts here on how great the company is, what nice guys the designers are, and great input from the designers themselves. All well and good. However, I haven’t come across too much objective feedback on characteristics and long-term experience with this unit. Particular interested in tonal balance, dynamics (the slam I need for rock music), soundstaging, etc. I’ve been in touch with Spatial for the first time on Raven availability and they are going into a new production cycle. The preamp looks great but I’d still like to hear from long-term users. Any input appreciated. Thanks.