I do these shops ALL THE TIME! They are on the board because they have to shop each store 2-3 times per week and you have to have a week or two in rotation before you go back to the same store. I'm lucky that I live in an area where there are 12 or so within 10 miles of myself and another 12 or so a little further out. I have already hit about 90 of these shops this year. You can use coupons and iBotta/SavingsStar so you really can get a lot of your groceries for $9, or $12.
The first time you do one of these shops it can be overwhelming. You get faster as you do more of them. I walk the exterior of the store, to count workers, looking down the grocery aisles for a worker and only going down that aisle if there is a worker. Sometimes I put an item in the cart so I don't look suspicious. Then I go to the targeted departments, with my real shopping mixed in. You can print out the grid form and take it in with you. I fold mine inside my "shopping list" which will tell me "bananas" if I have to ask a question about bananas...and the other things on the question list. I also put my shopping items I need at home on the list. But I usually check out the "Great Buys" for more bargains. I plan on an hour to get to the store, do the shop and go to the next store. I can do them in about 20-25 minutes if I'm in a hurry. The report takes about 20 minutes now that I've done a bunch. I also enjoy doing the competitor shops which are once per quarter.
I have not paid for groceries for over a year! I get all my groceries with these shops. Not just my groceries, but all my seeds and potting soil for the garden, socks, undies, and shoes from the "BIG market stores", office supplies, swimming pool chlorine and baking soda, items for my churches "feed the hungry kids" program, all the food for several receptions, all my canning supplies, Christmas and other holiday decorations, all the plastic under-the-bed bins and other plastic storage items for my craft supplies, kitchen gadgets and cleaning supplies.
I DO get tired of going to the jewelry department of one nearby store. I never buy anything. I think they might suspect me. And sometimes the monthly questions are a little lame.
The schedulers are really nice and they pay on time. I enjoy using the rewards points for gas discounts. Although you can't buy gift cards on these shops, I DO buy giftcards at this store (when there is a 2x or 4x fuel points) for when I'm doing a fast food/fast casual shop that lets me pay with a gift card.
If I could only shop with five companies, this would be one of them.
You DO get faster at doing these shops.