I finished up Persona 3: Portable this week (best RPG I've ever played in my 20+ years of gaming), so I eagerly jumped right in to The Answer part of P3:FES. I'm about four hours in and not feeling that compelled yet. I'm finding myself retreating out of dungeons at the earliest possible time since I'm afraid I'll get KO'ed and lose my progress. Can't say I really want to be doing so, but at with the hard difficulty setting being the only option for The Answer, I need to play it safe.
Persona 3 FES is one of my favorite games, and probably the best RPG I've played. The Answer is just a dungeon crawl with ramped up difficulty. If you really only liked the combat of P3 then you should enjoy The Answer.