1. The essays seem like they were written by those from American college who were primarily trained in approaches like deconstructionism and multiculturalism rather than schooled in Islam. Quasi-postmodern tools like deconstructionism and multiculturalism tend to be anti-rational and lead to fruitless discourse, which has been a problem in U.S. collegees in recent years, as good intentions about social injustices get lost when addressed thru half-baked intellectual tools. In fact, the information from this book on contributors shows that most are at U.S. colleges, so given the suspect "postmodern" flavor, the danger here is that Islam is being subjected to such postmodernization.
2. Little of the Quran is referenced.
3. A great deal seems not to have been thought thru. Capitalism, for example, is criticized but apart for appeals for justice, almost nothing is said about what a practical economic system informed by Islam might be.
4. Islam seems too malleable to these essayists. Although there is some appeal to early Islamic history, often in these essays you might think you were reading U.s. Green Party literature and not even realize that Islam played a part.
5. One gets no feeling for why these essayist's are Muslims: why not Jewish, Christian or Buddhist, all of which also concerns about social justice. Even humanists seem to share the significant concerns covered in this book. Pluralism may be fine, but if one has a commitment to Islam, can't one make it clear why and what Islam offers that other ways don't?
6. If you aren't familiar with Islam, you're probably better off reading an introduction to Islam first. Reading the Quran first would be a good step. You might also read a survey of Islamic history, to appreciate how powerful an influence Islam has been. But after reading some other material on Islam and/or the Quran, you may be as disappointed as I was by "Progressive Muslims", which seems to owe more to recent, ineffective and faddish Western intellectual sources.
7. Just because this book doesn't seem to well represent progressive Islamic views and provide some substance, doesn't mean that others don't. Progressive hardly needs to mean postmodern (at least in the sense these essays are postmodern). An American-based Muslim might have significant thoughts on a progressive Islam, but I'll be looking for writers from countries that have been Islamic for centuries, expecting they will have a deeper background in Islam and more constructive insights into what progressive Islam means.
8. Given that the essayists in this book seem well-intentioned, it seems likely that if they would abandon the use of unproductive postmodern forms of argumentation, they could find constructive ways to share their concerns. There has been enough exposure of the weaknesses within postmodernism in recent years that hopefully the essayists will recognize this problem.