Vita-Chambers basically grant you immortality and, unfortunately, take much of the challenge out of the game. Should you be reduced to zero health, you'll automatically be revived inside the nearest chamber without incurring any sort of penalty whatsoever. Therefore, it's sometimes to your advantage to simply die in a hard battle (and return with a new plan of attack) rather than use up all of your First Aid Kits trying to get yourself out of a bad situation. Why Ryan Industries never thought of a way to turn a profit from these devices is beyond me.