Who has taken Spanish 122?

Hello all,
 I am registered for Spanish 122 for this coming fall semester, and I intend on taking this course followed by Spanish 103 for the purpose of meeting a language requirement. I have no prior experience in Spanish so I assume that this introductory course will accommodate my lack of knowledge. However, upon reading reviews on this course, one review in particular stated that the instructor lectured in Spanish ONLY!! 
 To those of you who have taken this course I ask this,
  1. How challenging is this course for a student who is new to Spanish?
  2. Are the lectures really in Spanish only?
  3. Am I in way over my head?