I posted this on a different thread, but it's on topic so I'll include it here.

I admit I wasn't sure Sano should get a September call-up, but at this point, why not? He's been tearing AA pitching apart the last month or so. At this rate, he's going to be on the MLB team next year. Why not give him his cup of tea in September, wait for his super 2 status to pass next year and then call him up for good in June. Unless Plouffe starts tearing it up, there isn't really any reason to keep Sano down. He's going to strike out a ton, might as well let him start adjusting to major league pitching in September and give him something to work on during the offseason.

I don't have any problem seeing him come up in September.

Edit: I think my suggestion is a combination of the aggressive and conservative approach. Please let me know if I'm missing anything.

I'd personally promote to Rochester before deciding whether to call him up to the big leagues. Trout and Harper both spent time in Triple AAA. The one concern would be rather the organization would consider struggles in Rochester to be a reason not to let Sano play a few weeks with the Twins.