This song does not abuse a vocoder. This song does not use strange synth sounds to muddy the mix. This song does not have a 30 second rap inserted into it to make it 'urban'. This song does not go better with coke, though it may go well with a nice glass of wine.
This song is just a fine example of how good R'n'B can be. Jenny Wilson has a great voice and uses it to sing a fantastic song. Mostly piano, handclaps and backing vocals, additional instrumentation is used only sparingly to add tension to the middle of the track.
The result is a production that could have been made 50 years ago but seems very rare today. Wonderful.