Bought this to replace the FLA battery on my travel trailer. So far, it's been pretty good. I added some foam pieces to my battery box to keep it from sliding around too much, since this battery is considerably smaller than the old battery.
Test run:
I haven't done any trips yet but so far, I've used it overnight to run the lights, 12V fridge and the fans for the heating system in 35-degree weather, and charge a few devices in the trailer as a test. It went from 91% down to just about 50% charge and the voltage was still around 13V the following morning. It also charged back up pretty nicely the next day to about 89%, even with fridge and some lights still running. (For reference, I have a 165W solar panel and it was a partially cloudy day with occasional tree shadows).
Bluetooth App:
The app is handy and I like that I can shut off charging and discharging. It would be nice to set charge and discharge limits as a percentage of remaining capacity, but you can do it based on voltage so not a huge deal.
Overall, I'm happy with it so far. I'm considering ordering a second one to expand my capacity.