With a cramped backseat, and difficult access back there due to small rear-hinged back doors, it's best to think of the FJ as a vehicle for two plus gear. Up in front, most will find the driving position and front seating comfort to their liking, In back, yes, it's small and disappointing, and only kids will be able to fit comfortably; the huge step up to get in can be a hindrance, too. Those looking for a lot of storage compartments for smaller items and electronics might also be a little disappointed.
Ride quality is just okay, seemingly capable of soaking up minor imperfections here and there but becoming harsh and bouncy on the worst road surfaces; on rough surfaces, there's a lot of sideways 'head toss' that could be fatiguing. Refinement in general is also something that you shouldn't expect very much of in the FJ Cruiser. The engine is coarse and vocal during acceleration, and at highway speeds, a combination of tire noise and a slightly boomy engine note conspire to wear you down.