I found the confuser very useful as a study aid and I imagine it to be required reading for those sitting the UK CAA exams. However there are national differences in the way that PPL questions are set, and in my case (Belgium) the actual exam questions were very different in both format and content from those in the confuser.
Make sure you localise the air law exam to the location you train in as this can trip you up.
On the textbook side I found the Thom books well written with good content and quite user friendly.
Best of luck.