I'm very suspicious of this charger. It looks like another dodgy chinese reverse engineer of the bantam including pinching the software interface (just like IMAX do). The thing with the imax though is that they down spec some very important components in the voltage measurement circuits of the balancer which means it under/overcharges all the cells depending on where the parts are out of spec. So not only have they stolen someone elses design (at the circuit board level) + software, they have made it so it will ruin your batteries. Not saying this one is the same, but it even looks like they stole the bantam case design+button layout etc etc. IMAX at least changed the box!
Anyway, only thing to do it check each cell after a charge with a top quality digital voltmeter and see what they have been charged to (regardless of what the charger thinks it has charged them to). It may be fine, but I would be very suspicious until proven otherwise.
I really feel for bantam who are being ripped off left right and centre by chinese companies without the expertise to design their own units or even rip off bantam properly. M-K racing sold me my Bantam and now they only stock these on their site
Anyway someone please check the cell voltages...