We have a Falcon SS on our BN2/100M. It sounded a little tinny when new, but mellowed with age. No broken baffles, yet, but it's only got a thousand or so miles on it, and I haven't succeeded at clanging it (yet).
I'm probably the only guy on this/any forum that thinks SS mufflers are overkill--but not necessarily a bad thing--on a Healey, for several reasons: 1) our Healeys usually aren't used as 'grocery getters;' when we fire them up we're usually gonna give them a good run and, because of that, we won't have water condensation in the exhaust, 2) given the token ground clearance on Healeys, you are more-than-likely going to bash a hole in a muffler or pipe, which may or may not be patchable and 3) most of the 'free flow' type are of the 'glasspack' variety; i.e. the mufflers are packed with a fiberglass or steel wool, which often is gone long before the pipes or muffler casing, necessitating replacement (if you don't have sympathetic neighbors).
I bought an Ansa exhaust for my BJ8 many (25+) years ago. The mufflers developed dents and scrapes--how could that have happened :wink-new:--but no holes, but the aforementioned fiberglass packing had vacated the mufflers; the pipes were pristine. I spliced some 'HearthThrob' mufflers from J. C. Whitney in there and the muffler is still functioning at over 120K miles, and the pipes are still solid. It has a louder, sharper 'bark' than stock, and sometimes people think I have a V8 under the bonnet, but it's surprisingly quiet and has a pleasing tone--no drone--at 50MPH or better.