This review refers to the entire Phase 1 (Lessons 1-30).
I will begin my review with some comments on the promises regarding your supposed language skills after 30 sessions of 30 minutes and then move on to underlining the good points.
The publisher promises you that you will have intermediate Hebrew after 30 sessions of 30 minutes each. It is pretty obvious that that's not possible. (If it were, everybody would speak 15 languages on an intermediate level.)
Quite different to what they tell you, you most certainly DO NOT get to a level I would call immediate and you won't be able to have any "specific" conversations. Your learn about 6 - 7 verbs in the present - maybe 10, I didn't count, but: not many.
Opposed to what the publishers tell you, you will not be able to "comfortably" talk about past events unless you consider knowing three (or four?) verbs in the past in 3 persons comfortable.
HOWEVER: You will get a good feeling for the language. You will be very good at counting and at telling the time, you will really hear the language all the time. The course is very well structured and gives you some of the truly essential words, not just nouns and verbs, but also prepositions and time words and other words you really need (now, later, too much, far, important, good, bad, then, why, when, since when, for how long etc.)
I have been using this along with other, printed matter, and I find this is very pleasant to use. It's really easy - you can do it while you clean the house - , it's short (30 minute lessons), it helps you remember words and phrases and it's probably helpful in giving you decent pronunciation.
Very useful, especially for Hebrew I find (because of the difficulties you have when you only know little Hebrew and you are reading unknown words). Absolutely recommend it and will buy the second phase.
The idea of the Pimsleur courses is that you do 1 30-minute lesson each day. In general, you should be able to do each lesson once, though sometimes you might need a repeat. For this Croatian course, the first lesson was great and I didn't have to repeat it. For the second and third units, I had to repeat them a couple times each. The fourth unit I had to repeat about 4 times, and it took me about 8 times (!!) to do the fifth unit. The fifth unit really has way too much material, especially since part of it requires some really weird sounds that are not in the English language. They could have easily made the fifth lesson 3 separate lessons. So this was my only gripe, and I'm hoping it doesn't get worse in units 6-10 (which I haven't gotten to yet). If it wasn't for how hard the last unit was, I would have given these first 5 units 5 stars.
Otherwise, I really like the Pimsleur method. My friend is Croatian, and after I used a few expressions on him that I learned from this course, he said my accent was really good. That is the biggest compliment you can give a language course. I feel like this course forces me to say things the correct way, especially since the learning is purely aural and you are completely detached from how the words look. That being said, it might be nice to have some accompanying guide with the phrases written down since, if you are serious about learning Croatian, you are eventually going to have to read and write it. And sometimes you see patterns more easily when reading words rather than listening to them.