No, not worth it. Huge waste of money and time and they aren't really teaching you anything your school shouldn't have already covered.
I actually considered this as well but ultimately just bought my own resources based on my learning style and did quite well. COMLEX isn't too bad.. the questions are easier than USMLE and with 1-2 passes of UWorld, 1 pass of Sketchy, 1 pass of Pathoma, and 1-2 passes of OMG OMT you should get a pretty score
If your school tries to convince you to do a prep course, run!!!