Unless the exam has changed very significantly in the last couple of weeks (or whenever the "new questions" were introduced) it most certainly isn't worth it. I have just purchased it to start going through CK topics and the material is very different.
On my exam there were less than 5 "next best step in management" questions, most of which were quite easy and didn't require any real clinical knowledge to answer. In fact, if anything I felt clinical experience was most helpful to answer the usual UW-style management questions (which drug was likely prescribed leading to a certain side effect -> even if you don't know the actual side effect, you know which drug would most likely have been given to the particular pt). Also, it makes it easier to differentiate between common and uncommon presentations (eg, after your internal medicine placement, you will have a far easier time recognising Step 1-style presentations of conditions like MI, CHF, DKA, COPD, GERD, AKI etc) - but none of that really comes from UW Step 2. At least that was the case for me, I cannot speak for everyone, obviously.
To sum up, no, unless the exam change has been very significant, it is definitely not a good use of your time.
