Is Pimsleur Good For Spanish?
It has good audio The Spanish courses are probably Pimsleur's most popular. As a result they have some of the best audio. The native voice actors do a good job making the conversation sound natural while still speaking at speed that is easier to understand.
Anyway, if we are optimistic, and assume the 5 levels of Pimsleur can lead to B1/B2... 72 hours is an extremely short time to reach low or high intermediate. If we compare Cambridge estimate of 500-600 hours to reach level B2 in English, it's really hard to believe Pimsleur can get even close to that.
What if someone did the 5 levels of Pimsleur in one month? - Reddit
Can you become fluent in Spanish with Pimsleur?
Yes, you can learn a lot of Spanish in 30 days with Pimsleur, but nobody would seriously say you speak Spanish at an intermediate level after 30 days of study with Pimsleur.
Pimsleur Review - Obsolete, But it Works! - Language101.com