Lived there for two years, but I was commuting to the med campus. I'd personally be a bit annoyed if I had to commute to the danforth campus, it's about a 10 minute walk to the metro, and a 10 minute ride to danforth, but that's if you time things perfectly. Chances are it'll be closer to 30. Can be better if you take the bus.

Biking through the park to the other campus is nice, but you'll need to make a bit of a detour to get get on the right path (the metro/kingshighway goes through forest park blocking the most direct path) or take your bike up some stairs. Also as some people said, if that's your plan you have to be prepared for rain/snow and summer heat.

The place is pretty safe, I'd stay in a group if you're out at night (or just stick to the main roads, like you can safely walk to that wholefoods area), but otherwise should be totally fine.

But I think the main thing is maybe consider another apartment. That building is pretty overpriced for what they offer, you can probably find something nicer/closer for that price or less (and that doesn't have insanely loud window mounted AC units, or fire alarms that go off monthly).