history: Had to wait in line forever to check out at walmart , horrible I hate to be tired and see a store crowded with customers and only one or two checkouts open. Yeah it's really frustrating when they won't have more eople on. 
current: Especially when it's a time of day that they know will be crowded and busy.
next: Exactly. Hopefully more places will get self-checkout so we can get through the line faster. 