The sodium content can become an issue in cleaner styles with little flavor (light lagers, etc). It can also become an issue when you want to add a good deal of sulfate. If those situations don't affect you, then brew on! The 65 ppm level is not detectable by most.
The retail RO vending machines I've seen, have an actual RO unit in them. This is also a reason that anyone buying water from those machines should have their own TDS meter so that you can detect when the machine is not producing high purity water. When the TDS exceeds about 25 ppm, its time to be concerned. If its above 50 ppm, don't buy it.