I use Imperfect Produce, now Imperfect Foods, have been for over a year now.
They do make a few errors (and they have expanded to over 60% of grocery now), but all in all they are a solid bet in my city. If I don't get something on the order, they refund quickly unless I request an order credit to my next box. They also offer organic and non-organic produce. Always my choice. I can cancel a box delivery and move to the next scheduled delivery if I don't need an order or am away.
During the summer I order/buy from my neighborhood famers market so I really don't need produce from Imperfect. Summertime Imperfect orders are farther between. There is no limit to the number of skipped orders you can request. No commitment to purchase.
I will say the grocery items are priced well, as many are over-runs and label mistakes (upside down labels not sellable in retail settings). So, I do order meat items and healthy staples for the pantry.
If anyone is interested in starting up with Imperfect, here's a $10 discount link for your first order: http://imprfct.us/v/diane_1804
Diane, the Plant Whisperer