Great comment. LSAT CR can be fun to study and can definitely challenge you. In fact, something from 1/3 or more of the questions on this GMAT discussions board are actually LSAT questions!
Now of course the LSAT is a different test than the GMAT and while some question types transfer very well, there are others that should be treated as entertainment only.
In these two postings I break down the best way to use the LSAT to study for the GMAT.