I have linked my students in both critical thinking and introductory philosophy courses to this site as a way for them to have extra practice in logic and fallacies. I especially appreciate the sections on fallacies as nearly every student I have needs more practice in identifying fallacies in arguments. I and my students have found the site easy to navigate and access and find that the comments that show up for incorrect answers are helpful for students to identify why they got a partular question incorrect. I'll be reccomending that my adjuncts who are teaching logic and critical thinking also make use of this site.
The site is easy to navigate and access. A few students have commented that they found the yellow/green color combination of the site a little bothersome.