Kaplan offers excellent test prep resources across a variety of platforms (digital, in-person, and print) and a variety of content areas (from college admissions to licensure).
Kaplan updates there test prep resources every year with a new "edition," although, rarely does the content of the various editions change significantly. This can lead consumers to feel like they need to update their Kaplan test prep edition yearly, and therefore spend more money, even though very little within the test prep may actually change.
Kaplan self-test is a great resource, but if you are on a budget, and the assessment you are studying for has not changed significantly over the past few years, consider purchasing a past edition. Also consider what type of learning (in-person, self-guided books, or self-paced software) is best for you. In-person prep often comes at a premium, but for many learners, it provides the greatest improvement.
Kaplan has helped me prepare for college admissions, graduate school admissions, as well as professional licensure exams (PRAXIS). I am a very self-guided learner so I appreciate that they have various levels of guides available. I prefer to do the studying myself with the published guides, while others may prefer the software-based test prep, or in person prep.