I think 'well, it's not the shittest Nicolas Cage film' pretty much sums it up - average in almost every regard.
Up until the final showdown, none of the robots really seem like much of a threat. They turn up, go 'grr', and he beats the shit of them in about twenty seconds. Why does he feel obligated to fight them all? I'd just bugger off as soon as the doors were unlocked - he can't be doing it out of purely altruistic reasons (i.e. save the town), all the backstory is explained to someone else, in a different location. Why does he have to drink a can of off-brand red bull every hour or two?
In conclusion: who cares