Has Anyone Had Success with Frontline Publishing's Marketing Services?

Hi community, I’m exploring full-service book marketing options and stumbled across Frontline Publishing . I’ve seen they offer everything from ghostwriting to book promotion, which sounds ideal. But what I’m really interested in is their marketing service. Has anyone used Frontline Publishing strictly for boosting book visibility—either pre- or post-launch? I’d love to hear how effective their strategies were. Did they help improve rankings or drive real sales? Were there custom strategies, or just cookie-cutter stuff? I’ve already written my book but need help taking it further. Would appreciate any real-world feedback or recommendations!