I was in Wall St for the end of her tenure. I admired her handling of the beginning of her time as Fed chair (not raising rates too early when Wall Street was yelling for it), but IMO she ended up folding to pressure from politicians and Silicon Valley types to keep rates low for far too long. She was very good at not listening to the market (which is arguably a bad thing - when your rate target is 0-25 bps and rates are trading at ~20 bps, maybe you should listen?) or to the traditional Wall Street types, though.