I still have my old collection. I liked the series, so I decided to buy a new one for the first time over 15 years. The series has changed A LOT. Besides being more expensive, it also seems to contain less content.
I never did like the method that most learning materials use, where they just throw sentences at you and expect you to figure out the grammar on your own. I prefer to have things explained to me. I also like books that give a detailed description of how to pronounce the language (assuming that pronunciation can be determined from spelling with any reliability, of course).
What the series is now is nothing like the series I knew. I would like to find a new series that's more akin to what Living Language used to be long ago.