I bought Charlie's Triple (see his entry on this page), since he said it was for sale. I use the boat primarily with my petite wife and one or two of my small children, occassionally with other adult males. The boat is very large and is VERY stable. It tracks staight as an arrow, and conversely turns slowly, as expected for a 21 foot both with little rocker. The boat also seems quite strong. Weather cocking and wind drift are sometimes issues depending on who is in the boat and on weight distrubution. These issues disappear with the placement of water ballast in the forward compartment, near where my lighter passengers are. Overall, it seems the boat is at its best with a minimum payload of about 350 pounds, and I beleive it would perform very well at the rated capacity of 700 pounds. There is a huge amount of storage in this boat if you have no center passenger. Hatches allow access into the end compartments, but the front access hatch is kinda small.
This is not a boat for tossing around, but is rock solid with big loads and active seas. With my family on board, I supply 80 percent of the power, and we are able to avg. 3.5 to 4 mph. With another strong paddler, the boat is capable of both high peak and average speeds.
Mine is reported to weighs about 70 pounds, and at 21 feet, most folks will need another adult to get it on and off of the roof rack, something to consider if using it with kids. Consider that the boat has extremely high volume - experienced paddlers looking for a sportier ride might look into CLC's new 22' sport tandem, which is narrower and lower volume. The Triple is NOT suitable for solo paddling. Also consider that with such high volume, this boat would be more difficult to empty if it ever swamped. I am currently considering putting in an emergency electric bilge pump system.
I also have had the chance to SAIL this boat at a Chesapeake Light Craft event in Annapolis, Maryland. CLC sells a sail rig and outriggers that turn their kayaks into sailing trimarans that can be quickly disassembled. What a nice ride! Stable as bedrock, swift in light air, a real nice cruiser, but needs a huge rudder to turn. CLC suggested building the rudder in the sail rig plans rather than using commercial rudders. A sail rig is on my wish list for this boat.