Lithionics Battery

I have been doing some research and came across the Lithionics Battery as the new and improved way to go if a person can afford the batteries. Has anyone had experience with these batteries? I am interested in hearing your opinion. I checked the "Search" for previous posting and found nothing. The old adage says (if it sounds too good to be true it usually is). When they say one battery will replace up to 6 batteries? I am very interested in how well these work.