Idan is the sweetest professor and he definitely knows what he's talking about. He is super approachable during office hour and very passionate about teaching. However, this course is not easy and requires your dedication to it. His lectures include a lot of studies and those will be in your final so make sure you take notes down. Every week there will be an assignment composed of either 1) 3 papers + written assignment or 2) a problem set, and both take more time than you would think, so start early and plan accordingly. He encourages collaboration between students, so make sure you check your answer with somebody else before you submit because making careless mistakes is so common especially in problem sets. That being said, don't worry about your grade too much because you will get a lot of chances for bonus points and probably a large curve for the final. I like that Idan really wants his students to learn something out of this class instead of over-concerning about their grades. For me, the class materials are very interesting and I genuinely think I gained some important knowledge on language and mind. If you are here to learn something interesting, I definitely recommend taking this class ;-)

Psych 124A is incredibly interesting, but also incredibly difficult. I would be cautious when enrolling in this class because the workload and the course material really pile up. I believe I spent 18+ hours a week (outside of class) on writing assignments / problem sets. And I still barely scraped up C's on my submissions.
Despite the difficulty and workload, the material itself is fascinating. Topics ranged from phrase-structuring to developmental cognition to Bayesian inferencing. Overall, take this class if you're really interested in the intertwines of linguistics and cog sci. But if you're just looking for a good grade, this class is definitely not for you.