dr00l

Most Cloud based POS have an offline mode, which still allows you to process transactions. Vend (vendhq.com) stores a local copy of the information needed to process sales (products, taxes, payment types) and allows you to continue processing sales, although it restricts you to selling and you can't manage inventory etc

I feel you are making a assumptions on how "users" will feel about the experience, based on your personal experience, and past experience using another device which you are familiar with.

I experience the same confusion and frustration whenever I quickly pick up an iOS device. Spend some time with Android and you may experience a difference, especially after you have customized it to achieve your tasks quickly.