Interesting thesis - that excessive choice can be bad. Schwartz explains ways in which we may be better of with more limited choices (at least more limited than members of rich, relatively free nations have).
I've experienced this myself, on a small scale - usually "menu paralysis" - I've often said to a waitperson that I'd be better off if there were only 3 kinds of entrée....

Perhaps the most interesting point in the book is the difference between maximizers, who expend tonnes of effort to ensure that they get the best of whatever they're looking for, and satisficers, who have standards, but will pick the first thing that meets those standards. It turns out that satisficers are generally much happier and less prone to depression and regret. The explanation was compelling enough to make me want to shift my needle toward satisficering.

The book's major downside is the level of repetition - the same few points are made over and over, with little variation, so it gets a little boring by the end.