I have read books by Driscoll and Miller's book listed here. As I went through seminary their texts weren't required, but I'm not in my 20s...according to the government...
I really like Miller's book, it is very good. Driscoll has a unique style and I like some of his earlier stuff but haven't like a lot of his latest stuff. (His book on marriage is terrible and deeply vexing.)
Here's the thing about Driscoll, I don't understand why people still gripe about his former (and I mean like 10 years ago) style where he was overly brash and terribly crude in his sermons. He has repented to God and publicly...the man has asked forgiveness from his church and others openly. Why does this still get brought up? The guy didn't sleep with anyone, he didn' steal, he admits he was wrong and asks for forgiveness. What else does he have to do?
Now, Driscoll's latest book isn't worth the paper its printed on. I am not thrilled about it and recommend Tim Keller's book on marriage which is far better.
I do know that Miller and Driscoll are being recommended for seminarians, but so are Barth, Multmann, Habermas (Jurgen), Wright, and a host of others we might find things to disagree with. Part of seminary, just like with education, is being exposed to many thinkers to help one craft their own intellectual identity. This is important work. If I were teaching a intro seminary course, maybe on something spiritual formation or something like that, I'd recommend one or two of the books. They are important because they are good.