I just had an undermount sink installed in the guest bathroom and am curious if it is installed correctly. The overflow drain in the first picture (of the sink installed) is opposite the faucet, which I've been told is the correct way to install for most undermounts. However, because it was installed this way, the slope of the sink now goes towards the faucet and the flat part of the sink is opposite the faucet. The drain is also not directly under the faucet as it would be if installed the other way. When I was trying to figure out how the sink would look before installation, I stuck in in the old vanity in the opposite direction because that felt most natural. So is the sink installed correctly now? Is there a standard or is it only a matter of aesthetics?