I am now on Phase 3 of Mandarin Chinese, and I can't recommend it highly enough!
I live in southern China and this has helped me immensely in picking up some of the language. 30 minutes a day is SO worth it. That being said, I still like to get a cup of coffee and focus a bit. I can't really cook and do this at the same time. I am trying to maximize that 30 minutes...
Also, once you are through with this part, I might try to jump on something that will help you learn writing if you are interested in that. It is a little bit of a disappointment to myself that I didn't do that earlier. Still, for speaking and listening...you can't get a better 30 minutes in my opinion.
I live in China and almost everyone I talk to is blown away at how fast my Chinese is progressing. A cab driver yesterday said "Ni de jongwen bi wo de jongwen hao" ---Your chinese is better than mine. I have done almost zero studying apart from Pimsleur.
I'm also doing some rosetta stone on the side to cross pollenate, but I've only done 1 lesson of that.
There are times when you feel like you are lost, but that happens with any language, and any method. (I did Spanish through a similar classroom style pimsleur method, not actual pimsleur, but a similar auditory learning style) Keep plodding through and you will get there! Relax and be confident!
I am now on Lesson 63 of Chinese (Unit 3 lesson 3) and I couldn't think of a better way to spend 30 minutes a day. They all follow the same pattern. I will always start here with foreign languages.
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.