I found Glannon's E&E for Civ Pro extremely helpful, but then again, my prof recommended it. I haven't found the E&E series as helpful in other classes. As for Con law, again, I agree Chemerinsky is awesome and it is keyed to his textbook. However, sometimes, it does seem like you are reading the same thing twice.
There's so many hornbooks, supplements, study aids out there, you really need to see what works best for you. Personally, I like the Crunchtime series. It's not very good if you haven't paid attention or did no reading during the year, but it is good, at least I think, to look over right before finals. It's short, easy to understand and quick to read. A couple hours and you can cover the entire subject, or you can use it to grasp those hard to understand concepts.
Also, I've used Law in a Flash flashcards. They aren't too helpful for concepts (though I have found a few cards that helped me understand something). They are extremely helpful, I thought, for hypos though. One other reason I like them is I can tuck them in my backpack and review them between class without having to add any more weight to the ton of books I already have to lug around.
Personally I haven't found the case briefs too helpful. They are good, however, when you haven't had time to read for class. They give you basic facts and black letter law.
The worst part about everything is cost. I, for one, probably went way overboard on study aids, supplements and hornbooks my first semester. Now, I still have a lot, but I think I have found the ones that work best for me, and that's what is important. Also, in the end, I can sell them all and maybe make back a little of what I spent.