GMAT Online vs Traditional GMAT

Well, from my experience I can say that GMAT online was a lot different from the GMAT at the test center. I felt that difficulty level of questions was higher, I would say- experimental. Later, I took 2 tests at the test center and I felt the test was more like the official mock exams. I am not sure if someone had smilar experience, but I advise that you take the GMAT at the test enter if you have such option. 1) You will have longer breaks between each section 2) You can get unlimited amount of scratch paper, earplugs, pens etc. 3) No one will disturb you in the middle of the exam. In my case, a lady supervising my exam wrote to me on chat (she thought I have an "illegal" item) and I found it really disturbing.