Yeah, I am taking one for the team. The way I see it, SLA cost about $75 - $100 each time you have to replace if you buy them locally, or maybe a little cheaper plus shipping online. Mine are 12ah and they already have reduced their capacity to around 8-9ah (in only one month). I use these almost daily to commute to work (4 miles one way). I come home for lunch and go back on the bike as well sometimes. Then I return back home, so 16 miles with 3 recharges almost everyday have done a number on my SLA pack.
My new LiFePO4 pack cost me around $350 for 10ah (almost equivalent to 20ah SLA) and an 8 amp charger. If I get even the same cycle life as SLA, I have at least the benefit of a 15 lb. pack instead of a 30 lb. pack. From what I have read, the recharge cycles are over 1000, so this method has a higher upfront cost, but cheaper than the bricks in the long run. Plus, I can sustain high drain rates while going uphill.
The maximum drain rate I will have will be 3C. Since the max being reported at 30amp drain, my pack is 10ah, equaling 3C. (This is only for those that do not know what a "C" rating is.) With this drain being so low, I think the pack will do great over the next couple years.
No fire risk and a BMS included, we need more to jump on this wagon. I hope I am not eating my words, but with a 3 year warranty provided by Foxx, I am not worried about a cell going dead. Like I said earlier, I will try to provide as much info as I can about this once it is in my hands.