My wife and I are new to sit-in kayaks, having come from sailboats, and Hobie Mirage Sport SOT pedal kayaks. We've been demo'ing everything under the sun, and finally refined what we wanted. She got an Impex Montauk, and I got a used Kevlar Susquehanna.
I'd been in the Currituck and the Montauk, but the Susquehanna's additional initial stability and GREAT maneuverability were just what I was looking for. The boat will get blown around a bit by the wind, but the easily operated skeg lets you put your energy into going straight. I'm 5'8" and 185 pounds, and the boat fits me like it was made for me.
Danny from Impex was at the demo, and noted that my used boat had the wrong backstrap in it. He told me to E-mail him and he would send the right one right out to me. I'm really not used to this level of customer service from a company.
In speed the Susquehanna, with its additional rocker, is a little slower than my wife's Montauk, which is fine, as she is easily able to keep up with me.
The boat edges with the slightest pressure on the footrest, and the skeg can trim it for straight running even in the quite heavy breeze that came and went today. The hatches are not quite as water tight as the Montauk's Valley hatches, but they work pretty well.
In Kevlar, I can easily carry the boat in one hand by the cockpit coaming.
My advice: Buy it, you'll LIKE it!