I just got my Herron and set it up the night before last. It clearly outdid my Pass XP-15 and my Manley Chinook, both of which are very good phono stages. More separation between individual voices and instruments, a more clearly defined sense of space and a larger soundstage. The sound has more body and everything sounds more "lush" for lack of a better word. I wouldn't describe it as totally "neutral", which I'd say both my Pass and Manley phono stages lean towards, but it doesn't sound like it's exaggerated in any way either, if that makes sense. I'm still drinking in the differences, I've only had a chance to listen to a few records.
I've been using it with my Acoustic Signature Wow XL turntable with a ZU Denon DL-103 that is freshly back from a rebuild by Andy Kim. I tried it last night with my "lowly" Technics SL-1200 MK2 with a Shure V15 Type IV with a SAS Jico stylus and it sounded amazing, better than most analog systems I've heard. It's in another league with the Wow XL and I'm looking forward to trying it with one of my higher end cartridges.
I predict that you won't regret your purchase, and you won't want to sell it.