Warning: my review is based on the 2nd edition of this book. This is noteworthy, since as mentioned in the introduction to the latter, the content of the book has been majorly rearranged and expanded from the first to the second edition.
What I liked most of this book is that it doesn't deal with statistics at all. Normally, in experimental design books this would be a huge lack, and definitely not an upside. Nonetheless, in this case this is an advantage: 1) because it avoids repetition, in case you have a foundation in stats (and was it not the case there are plenty of options out there for you to catch up) and 2) because instead, it deals with topics that I haven't seen in other experimental design books, or at least it does in a simple and interesting way.
If you want to learn about the general features of an experimental project, this is the book for you. Some of the main points treated here are: framing a research project,system validation (what type of data are we to measure? How? How do we ensure that the system is going to work?), Controls (positive, negative, controls for assumptions and so on) and model building and validation. Noticeably, a considerable part of the book is devoted to a discussion of two different experimental frameworks: the hypothesis-falsification one and the open-question one.
Overall I do suggest this book but make sure to complement this one with another that goes into more detail on topics such as how to establish the sample size and how to carry out statistical analysis. Last, a small criticism to this book maybe be the way replication is treated. After reading "Experimental design for laboratory biologists" by E. Lazsic (similar title, I know) I found the treatment of this matter inappropriate in this one by Glass. The distinction between "biological replicates" and "technical replicates" is in my opinion a bit too superficial, so I would suggest to complement this part of the book with further reading as well.