I'm sure Focus does good work. The problem is their minimum order is 1000 books. It looks like their typical book price is $20, so you're looking at a big outlay.
The nice thing about Lulu and other Print On Demand services is that there is no minimum order. You can buy one or a thousand.
I've printed books using Lulu, Blurb, and MyPublisher. I think MyPublisher has the best quality of the bunch, but I'm sure it is nowhere near the quality of Focus. It also doesn't cost $20,000