Lone Star is indeed the star of its basin. It erupts from a huge, beautiful cone on an interval very close to 3 hours that seems unaffected by any other geyser's activity, although it's hard to tell for sure as reports of closed intervals are rare. Major eruptions can last 30 minutes, reach 45 feet in height, and end in a dramatic steam phase. Majors are usually preceded by one (sometimes more) minor eruption that reaches similar heights but only lasts 5 minutes or so. The major usually occurs about half an hour after the minor, introduced by increasingly heavy splashing.
Time was when Lone Star could be approached closely from one's automobile. Today it's a hike (or combined bike/hike) along an old road from a parking lot at Kepler Cascades, south of the Old Faithful complex. There is normally a logbook in a box at the viewing area; if you're the only ones who witness a Lone Star eruption, do other gazers a favor and indicate the start time -- the next eruption is very likely to be almost exactly three hours later.