Spent a lovely evening here in October 2001. The David Lesser Memorial Shelter (there was no indication as to who David Lesser was) is a clean, beautiful shelter with a lovely porch and skylight. There was a big Adirondack chair on the porch as well as seating along 2 sides of the porch. A separate, covered dining area also had a beautiful 2-person swinging chair that I sat on while filling out my trail log as the sun went down. Here's a picture that fails to do justice to this lovely shelter: http://www.jmclum.com/spring2000hike/050100c.jpg
The only drawback is that the spring is a good quarter-mile down the mountain (knowing this ahead of time, I brought down my 4-liter water bag to avoid a morning trip).
There's an overflow camping area below the shelter that looked fairly well used.
The hike north into Harpers Ferry was easy, quick and pleasant.