The question types are challenging and most likely at a higher difficulty level than the actual GMAT. The questions are good for practicing difficult questions and gauging what sections need the most work. The question pack is good for those who are at the high 600-low 700 level looking to improve their scores. If you are able to answer the higher level quant questions on this website than that is a pretty good indicator that you will do well on the actualy GMAT. The verbal section needs work. Some of the Critical Reasoning and Sentence Correction questions are written poorly and do not reflect the verbal style of the actual GMAT.