John,
I have been using S&W for a while and have not had any problems with it removing my finish.
You'll probably be removing more of your finish due to the friction of the wiping than the S&W.
I think Steve mentioned at one point that S&W will take off a little of your LSP since S&W is a cleaner. Since I find myself putting on a new coat of EX about once a month, it's not a problem for me. I've never seen it totally remove my LSP in two months, with about once a week use either.