We rode the full length of this trail round-trip in summer. The attractive Amery trailhead on the east end does not have restroom facilities , but there is a bathroom building just 1 block east on the rough gravel ATV trail (or turn Left and Right on the first street). The western end of the trail outside Dresser is just south of a park with pit toilets (turn Right at the end of the trail). There is also a porta-potty around the midpoint. Because it's a state trail, a fee is imposed on bike riders over age 16; there are self-pay stations at the east end, midpoint, and parking lots along the way.
The trail is flat along its whole length, without even a gentle grade to be seen. The surface is very smooth, hard-packed stone which was no trouble for my road bike with its 28mm treaded tires; even the narrowest slicks would have been fine. I only spotted a handful of small holes or ruts in the surface. There are several point-of-interest signs, and signs for 5 of the 7 lakes that the trail is named for. At the Amery end the trail traverses an isthmus between the Twin Lakes.
There were several other users out on a summer Sunday, but not enough to make the trail feel crowded at all.
Our westward trip came to an abrupt end as the 14-mile trail actually ends at a road crossing at the 13.1 mile mark. I found myself wishing for a few more miles of this great trail.