Unfortunately, performance isn't as solid as we'd like, and frame-rates frequently fluctuate on a regular basis across both consoles. At worst, a lunge down to near 30fps rears its head in one particular scene, but metrics mostly stick between 50-60fps over a run of play. This causes judder that distracts during high speed traversal, with momentary spikes on controller latency having an impact on pulling off more complex moves. The PS4 version gets closest to providing a 60fps lock for extended durations, while on Xbox One the engine struggles to hit the desired frame-rate once you start exploring the rooftops or engaging in combat. The 'perceptual' 60fps experience is certainly within reach, and there are times when both platforms operate smoothly with no issues. Less demanding scenes with little action see performance stabilise, with consistent gameplay during these moments.