One of the biggest let downs for me was Cella soap, I tried both that and P160 and I can get a decent enough shave with it but there has never been that Wow factor for me. C&S soap was a good performer but the musky rose scent was not to my taste either.
I don't think boar brushes are over rated because i never had high expectation for them. I know some guys swear by them but again just not to my taste.
Most under rated for me is La Toja shave stick, the soap is great little performer and a pleasant smell. Coupled with the La Toja Aftershave the pair work well.