I always get amused as every lithium upgrade thread devolves into who has the most watts of solar, and amp hours, or who is more esoteric such as SiO2 or telcom jars (whatever they are), or bluetooth reporting from your batteries, or shunts, or pure sine wave, or whatever.
To the OP, I installed a single Battle Born Lithium battery and a Progressive Dynamics convertor in my trailer. I know I paid a lot. Do I like it? Yes. I was tired of messing with the heavy lead acid batteries, pulling them in the winter, checking water levels, off gassing concerns, and trickle chargers, plus occasional replacement. I now disconnect my battery at the end of the season and let it sit in the trailer and it is good to go in the spring. There are no corroded terminals to clean. The extra volt plus it provides helps with slide operation and electric dump valve operation. The extended number of duty cycles means I wont have to fuss with battery issues again for my 15 year old trailer. Bottom line, the peace of mind the lithium gives me is worth it. The battery fits perfectly for how I camp and in what temperatures.