Nah, it felt much scarier. With the NAPLEX, I got about average score, but I knew I was doing pretty well when I started getting really hard questions either I didn't learn in school, was a tiny and obscure detail, or pharmacists just wouldn't generally know. MPJE was all over the place. I got an 80. My friend was a pharmacist out-of-state for a couple of years before studying our professor's federal notes plus a Texas MPJE practice exam with explained answers. We both thought we straight up failed coming out of it. My only tip, if you want to feel confident about the exam, is to know every aspect of the law, back and forth. Cacciatore's book might be good. I only saw pieces of it from a supplement pdf I found online. I read through the actual law book, got the e-book from LexisNexis. It's very, very repetitive and long and boring, but I read through it once and tried to skip through the parts that should have just said, "same as other classes of pharmacy." I also read my professor's old federal notes that didn't help at all. Everything he told us would be stressed on the exam was not on the exam... So really, all my knowledge came from rotations, my time working as a technician in undergrad, and the law ebook.
I think it was so scary because we need a 75 out of 100 points to pass. This sounds much harder than the 75 out of 150 for the NAPLEX, but it might be scaled in such a way to give similar results. But yeah, when you study, really go over everything and try to remember as much as possible. Texas MPJE doesn't mess around. They will test you over every little bit of the law, very often multiple concepts in one question in such a way where if you don't know or are unsure of one part, you'll get it all wrong.