The book is unusual (and remarkable) in its portrayal of not just the claustrophobic lives of women, and in many cases, men, in the Kingdom of Saudi Arabia, but also in its suggestions of the tiny revolts and rebellions that will almost certainly lead to the collapse of this oppressive culture in the not too distant future. That note of hope redeems an otherwise somewhat bleak atmosphere.
Very few novels have similar settings and similar perspectives - Reading Lolita in Teheran comes to mind - and more are certainly needed. All credit to the author for boldly going where not many have gone before.
That said, the narrative and the language are nothing to write home about. The author is a competent story-teller, but not a brilliant one. Doubtless her style will mature and evolve with time, and I look forward to reading her future work.