Update: faucet leaks. Appears to be defective valves in both faucets. Took more than 30 days to get a plumber in to find the problem so will have to rely on Kohler warranty rather than the simpler Wayfair return. 

Arrived quickly. The installation instructions were wrong and it seems that perhaps some pieces were missing. The install wasn't nearly as straightforward as anticipated and the anchoring seems lightweight.