What can I say about usmle consult... It isnt the best question bank that is out there, but i definitely wouldnt say it is useless. I am doing it now, and plan on getting through all of it. The questions are a mixture of very difficult and very easy questions, so the difficulty is more variable than most of the other banks. Along with every question there are very detailed explanations, and i have gotten some nice pictures from them. However the explanations are often excerpts from the various books from the publisher, and sometimes not as focused as you would like. It will take you longer to review your answers for this reason.
I have gone through Kaplan Qbank, Gunner Trainings Question Bank, USMLERx, am almost done with USMLE consult, and am starting Uworld on the 20th. Since i can not speak on Uworld yet since i havent started it, I would say that I would rank kaplan qbank the highest, then usmlerx of the banks i have done. I think USMLE consult could be a good learning tool though, with the in depth explanations. This bank has some errors, but that could be said about most banks, since no one source is perfect.
Usmle consults scorolator did seem to be pretty good in the sense it was pretty close to my nbme 5, which i took around the same time (NBME 5- 253 vs Scorolator-252ish). The questions on consult do vary in difficulty greatly, but so does the question on the nbme, with some easy questions and some that seem to be so hard they dont make sense. Whether or not to go with consult in my opinion seems have to do with how much time you have. For most without an excessive amount of time i would say go with kaplan qbank as a second question bank if saving world till the end.