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.