Buying a POS for a busy independent supermarket comes down to three things that actually matter on the floor: speed at the lane, resilience when the line drops, and stock control you can trust.
Fast scanning keeps queues moving at peak; an offline-capable hybrid engine keeps those lanes trading through load-shedding; and real department, category and cash-up control keeps the back office honest. Everything else is a nice-to-have on top of those fundamentals.