Jim Bowie was stabbed through the lung by a Sword Cane in the famous Sandbar Duel. With the Sword Cane still in his chest, ol' Jim stabbed his antagonist, Maj. Norris Wright, to death.
'Course Jim was a tough ol' bird and, besides being stabbed, was shot at least twice and beaten as well, but still manged to walk out the "victor" (as much as any man can be said to having been stabbed through the chest, shot, and pummeled).
That said, I own a Sword Cane myself and am not greatly enamored of them. I really recommend a different hide-out weapon. First, because Sword Canes are illegal to actually carry in most every jurisdiction. Second, because, as has been pointed out, they're pretty mediocre as far as being a sword. No protective hilt, generally shorter length, and (in this case) a grip not particularly conducive to sword-work.
However, it does give you reach, and this version is capable of draw and push cuts. Balance doesn't look promising, but that's not as big a deal in this type of sword.
One thing that many people overlook with Sword Canes is the
scabbard. The shaft of wood and/or metal which houses the sword. In most cases it makes an excellent left-hand parrying weapon (as much as can be expected sans an effective guard). Often it also makes a dandy bludgeon. In the case of the Cold Steel offering, this is especially true. The blasted thing hits as hard as and is more resilient than a hardwood stick.
What I would honestly suggest is using a two-weapon style. Club in your forward hand (left hand if you're right handed) to act as a shield, parry, and bludgeon, and the blade in your rear hand to cut, thrust, and to generally convince your antagonist that trying to close range on your bludgeon in order to render it ineffective would be lethally stupid.
To be honest, this is a combination strategy that I personally find effective. I like a cane in my right hand and a knife in my left, or a Saber in my right and a bowie in my left (when "revolver" isn't an option for the left.

).
Peace favor your sword,
Kirk