Panterra Gallery review for Point of Sale

I came here to read recent reviews because we are still struggling with syncing between our in-store square system and our Shopify website and I keep HOPING Shopify POS systems have improved. By the reviews I read, obviously not. We've tried Shopify POS TWICE and both times it was unreliable. No peripherals - barcode scanner, credit card machine - would remain connected to the iPad so we would have to jump through hoops, WITH CUSTOMERS WAITING IN LINE to reconnect them. Customer support sent us 3 pages of instructions which were insane & STILL didn't fix the problem. HOW CAN SHOPIFY INVENT THE BEST RETAIL SOFTWARE SYSTEM/WEBSITE BUT CAN'T DO POS WORTH A DAMN? So incredibly frustrating.