I've made 10 or so of their kits. I've enjoyed them all. The only negative is that I prefer whole hops and their kits have pellets. At first, I bought from them because their kits are cheap and shipping is free. Now I just really enjoy brewing and drinking their kits. I'm kinda on an unofficial mission to brew them all.
To answer the shipping question: They state that the free shipping takes two to four days before it leaves their facility. Since they are in Cali and I'm in Washington (state), it takes 2 days once it leaves. I typically buy on Friday (payday) and it shows up the following Friday.
Their customer service is good as well.
Long story short; I like them.