Hmmm. It's a shame (and a bit scary) to read so many negative reviews. I just used Instacart for the first time and had no problems (as far as I know, although I will be going over my next bank statement to make sure they didn't charge me twice.) I don't mind paying a little extra for groceries because of the convenience. However, I gave it four stars instead of five because it appears they don't treat their employees well. A five percent default tip is ridiculous. The default tip should be 15%, the typical tip amount. I gave my shopper a 15% tip on your website and also gave her a couple of extra dollars when she arrived. Your workers need to make a living. Perhaps all the negative reviews are reflecting how you treat your shoppers, If you don't care, why should they?