I'd give this a 2.5 for me, as it really was just okay, but after having looked at the other reviews, I decided to round up because I don't believe a book's quality should be assessed based on the moral judgements of its readers. It's one thing to say a book is poorly written, constructed, plotted, or its characters are one dimensional, etc. But to say 'this book is not good because I disagree with the morality of the characters, choosing to use a love potion', is silly. Not that I think the Love Bug story points add to the quality of the book as a whole; in fact, I actually think the book could've done without that bit entirely, and would've perhaps been stronger, as that whole back and forth was ultimately a bit pointless, and the characters and relationships were interesting enough on their own. Also, characters are meant to be flawed-- and sure, maybe *you* are the kind of person who maintains utmost integrity, even in the face of heartbreak, and you would never succumb to your own desperate misery. But I'm not going to pretend for one single second that I couldn't be led down a 'dark path', or that I'd label someone who did resort to something like a magic love pill as a 'bad person'. Yeah, there are ethical issues with that-- that's precisely why we have Science Fiction (or, in this case, Romantic Comedies with Sci-Fi-Light elements), to extrapolate and tease out the potential pitfalls of such medical and technological advancements.
Outside of all that, The Love Solution is truly mediocre. It's the kind of thing you pick up because you've exhausted everything other option, or because there's a secondhand copy on sale for $1.99. It feels like it has been churned out, a bottom of the barrel tale that the author spruced up so she could make that next mortgage payment. It all feels very dated, in its language and domesticity, as if it was either created twenty years ago, or else is intended for an audience of senior citizens who prefer a more tame story.