The Orion binocular viewer has a pronounced effect on viewing the planets and Moon as well as deep-sky objects. Now includes a 2x Barlow lens to reach focus with most telescopes. Use almost any matching pair of 1.25" eyepieces (sold separately).
We used our new binoviewer at a public event for the big full moon of march 2011 and looking at the moon with both yes was really relaxing. And perhaps less straining since the intensity gets split in two I guess. People really enjoyed it, the adjustable width was perfect for young kids. Two members of our club ordered their own Orion binoviewers since then.