Poss asignments have been in Llyods Chemist, Chain of optiticans, Chain of family restaurants.
You get a brief telling you specific things to check or ask about, could be do they have a certain sign at the till or did they ask if you want stamps.
Other basic stuff to note each time like greetings, cleanliness, how many staff on floor etc.
You have to remember everything as you can't take notes in the shop.
I never took any of their jobs on as they payed approx £6-7 per visit, which if you were in town anyway isn't too bad as it won't take more than 1hr. It was all the faffing about writing it up and sending it in that put me off, plus not many jobs in my area.
I had done merchandising so did a few one off jobs for a merchandising company. Never doubted retaileyes genuineness though.
I have just sgned up to retail eyes and as yet have not undertaken any assignments. The fee there clients offer are just not enough to cover any expenses and give some kind of profit. Will keep trying though who knows what the future can bring.