My husband and I joined about 3 years ago. We remodeled our kitchen and saved about 10,000.00. Like others have said it is a very high buy in and the freight cost are a bit high, but if you are looking into purchasing alot it is well worth it. We have also rehabed a home, and purchased all the flooring and counters through them and saved about $5,000.00 and that.
I think some people get discouraged because it is not like a store where you go in and pick out what you want, it is a place that has manufacturer catalogs, pricing and some samples, you have to do your homework before you go. Pick out your purchases at retail stores and then go and see how much it would be at direct buy. It will take you longer about 4 to 8 weeks for dlvy, but when you special order somethings it's about the same. They will tell you that some things are cheaper to get at the stores. Cabinets, and furniture will cost you about half, lets put it this way my cabinets cost $6,000 (high end) and it would have cost 14,000 at a kitchen design store.
Think of it this way, the furniture you can afford at a retail store and the furniture that you can get at direct buy is much different. Go to a upsale furniture store and see the prices. You'll think how can anyone afford these. Well you can at direct buy.
They also have other places that they deal with and you get a discount, such as wholesale flooring places, granite, and appliances.
I have never had problems with the customer service at the hoffman estates office, they have always been very nice and helpful.
You should call them and go to one of their pitches, it doesn't cost anything to listen. They will also show you the books, so if you have an idea of what you want then you could look at the books and see if it will be worth it for you.