Out of all the books I've owned through the past twenty plus years as a trumpeter, I felt like the Arban's book has been "the" book.
To me, it's the "trumpet bible" for trumpeters.
I used to practice eight hours a day (or as much as I could possibly practice), while attending Berklee in Boston; until my lip was so beat up, I had a scar on my top lip.
I learned a lot going through the book and it was definitely a ton of fun using this book in college. The chops I have to this very day are partly owed to going through that book.
Right now, I sort of developed my own exercises, which I have not had time to notate, but I feel like I have developed "my own licks," which I hope to someday notate.
But in the mean time, the best advice I can give to a beginner, intermediate and even practicing professionals, is to make sure you have this book in your practice room. Get one for your students or have them get one.
Also, be sure to visit my trumpet shop, Robert's Trumpet Shop at http://robertstrumpetshop.com, and pick up whatever you need, from beginner equipment professional. There is also a SHOP tab on this site.
Keep on trumpeting trumpeters and please stay in touch.. drop me a line.