"The latest sneak attack from genre kings Blumhouse is an unusually patient, detailed and visceral cyber-thriller that plays like a Black Mirror rethink of The Six Billion Dollar Man, and may be the closest any mainstream production is likely to get to Japan's cult Tetsuo movies... at its best – in a boundless chase round a hackers' hangout, and a high-speed freeway pursuit – Upgrade is as fluid and exhilarating as anything the Wachowskis signed their names to in the days when they were brothers: the kind of nifty, sometimes nasty surprise our multiplexes sorely need." - Mike McCahill, Guardian