Lithium has pros and cons. Depends what your system goals are. Lithium actually ***** for full on burp cars. Caps are much better imo. Lithium is better for music builds, but still needs alt support. Otherwise it will deliver its amperage at 12v. I still honestly think that all things equal, a bank of quality agm like XS or Northstar will still outperform lithium. But there are space and weight constraints.
To me, the ideal lithium customer is someone who doesnt chase the meter, and has definite weight or size restrictions.
Ive used commercially released lithium (Limitless) and garage made lithium (tenergy and headway)... my observations are true for both
