Was originally posted the wrong item so I emailed the details and requested replacement. Fiona responded within hours and had a replacement unit in my hands by the next day.
The unit works generally as advertised. The app has plenty of options for charge control and a good UI.

Got the new BMS 4S 250 and installation was easy to do. Cells are showing exactly the voltage they should be. The replacement module arrived in quick time reducing myfrustration with the old unit. System is working perfectly now. Thanks LifePO4oz

Purchased a 4S 12V 250A SMART LIFEPO4 DALY BMS WITH BLUETOOTH BALANCING FUNCTION and an extra BT module. Shipping was quicker than expected. Kit also included an indicator/status light and small LED battrey gauge, both which were not shown in the product descriptions/order. Couldnt be happier.

This was a replacement BMS for faulty unit that was supplied initially. This works perfectly and makes me a happy cutomer

I have 2 of these for almost a year and have found they balance all cells in both banks within 2 millivolts. The active and passive balancer really does a good job. Installation is easy and software is straight forward to use and adjust by bluetooth or remotely by internet or phone.. Support from LifePo4oz has been excellent. I am using two 250Amp models with two 12v, 304Ah EVE cells on my boat with 1000watts of solar. I can run my Microwave, hair dryer, induction cooktop and 4000watt, 8000watt peak inverter with ease.