Apple does amazing work with their refurbished devices, you wouldn't even know it's a refurb if it weren't for the packaging.The 5K panel is gorgeous, the CPU and GPU are no slouch (you can even game at decent settings, not that it will ever take on a dedicated gaming PC), and the 2TB fusion drive is "good enough" that I rarely notice it's not a proper SSD. My only complaint about the system itself would be the lack of ports for having such a huge specialist space on the back, 6 or 8 USB 3 ports instead of the 4 that it has would be welcome - but a hub is always an option at least.