Not horrible, but not mind-blowingly good. I did like it. A bit more angsty than I was expecting, though it sort of evened out with their HEA. This is a good book to read if you're really into the drama and angst surrounding fertility and conception, as that's the main focus on the plot.
Some things to point out:
There's an age-gap. When she was 17, he was 30. So 13 years apart. The book takes place when she's 23, him 36.
Also, the one thing I didn't like was his use of "kid" for an endearment. He explained why he still used it (it reminded him of her young, innocent, sweet, etc), but I just didn't think it was appropriate. Especially when he was also using it for real, actual kids as well as his wife. Also, he used it quite a bit and I have a major pet peeve with any endearment used too much and too often.