Anyone Install Lithium ion Batteries? Results?

Bottom line is that the cost advantage of lead acid is quickly disappearing and there many cases where you can easily justify the LiFePO4 batteries.

For me for instance, I'll certainly never get the 3000 cycles....but if I were to consider them against some of the pricier AGMs (buying pricey for perceived or real reliability),then they are an easy win even if I only ever use 500 - 1000 cycles particularly since the weight and volume are quite a bit less.