I'd do nothing but reading if I could (ok, maybe eat some great food, buy some fancy shoes between two books...oh, and spend some quality time with the gorgeous guy I married while I am on reading-break anyway...)
I liked the world building, the idea of the setting. The Alien invasion, the underground battle station, the last stand the humans are making, the reptile/dinosaur Aliens etc.
Then the romance happened. And it was cliche-ridden, stupid, too fast and boring. It had bad non-sexy sex scenes, OTT Alpha-macho bullshit (including ripping apart of t-shirts to undress his sexy temptress quicker...urghhh), unnecessary guilt trips and so on.
There was no falling in love, the hero and heroine already had a thing for each other at the beginning of the book, and it was only a bit of a push at each other (done through dramatic, life-threatening situation and said alpha male behaviour "me protect what's mine") and the love story was done.
The heroine was unrealistic and more a sketch than a fully drawn character. Supposedly she had been fine with living a meaning-less luxuious party-girl life prior to the Alien attack. Which obviously functioned like a lobotomy and gave her a new personality/character. Aha.
That was really a bummer.
If this was just an action scifi novel, it would have been better. This wooden, boring and 90ies bodice ripper kind of romance killed it.