I appreciate the input, as far as the "core" does paddaling cause any grief in the upper back or neck. I honestly think that if I approach this at a measured rate that I'd see a health benefit, and no doubt as a young 55 I could use it.
I just wanted as much input from a large cross section to be an educated consumer and not look at kayaking thru rose colored glasses. I know there is a lot of variables but I don't think that If I buy used and get a seat and paddle that fit me that should it not pan out I can sell and not take to bad of a beating.