I was given a Cirrus LT because its builder, a gentlemen in his 70s, found it too tippy for his liking and was not comfortable paddling it. That said, I have never felt uncomfortable with the primary or secondary stability of this kayak which to me seem very similar to a P&H Bahiya, another narrow, hard chine, boat that some (usually inexperienced) paddlers find tippy.
My Cirrus LT was built before the strip deck (Hydrid) version became available from One Ocean Kayaks so the cedar deck on mine was stripped to the forms for the stitch and glue deck which gave the deck a unique shape with more of a peak in the center of the deck than Cirrus LT Hybrids built from kits or plans which are more rounded.
The Cirrus LT has a hard chine hull that turns well when edged. I have paddled in most conditions that occur in the Lower Chesapeake Bay and have always felt comfortable in this kayak. My Cirrus LT has no rudder or skeg and I have found that this hull really does not need one. With the wind on the rear quarter it will weathercock a bit but no worse than any other Greenland style kayak I've paddled. I'm 175lbs and the Cirrus LT fits me like a glove and there is plenty of room under the foredeck for my size 11 feet. The Cirrus LT is great for day trips but for an overnighter I want something with more cargo capacity.
The Cirrus LT is fast for a 16 footer and I have no problem keeping up with 18' touring kayaks. I agree with the previous reviewer that recessing the cockpit rim would be an improvement and this is something I may change on mine when the deck needs refinishing.
Overall the Cirrus LT a great little day boat for smaller (under 190Lb), experienced, paddlers but with a 21.5" beam I would not recommend the Cirrus LT to inexperienced or timid paddlers.