I just started a retail business, and it is dreadful! It can take Sim hours to sell anything, the customers just seem to socialize more than anything and by the time they are ready to buy, their needs are so decayed that they end up leaving.
I love running a retail store, but the retail aspect IMO is a hot mess in this game. I've never used a mod for my game, just wish we didn't have to get a mod to fix what should be so obvious...No customer should spend 14 sim hours to decide whether they want a carrot cake lol