I haven't used the ultimate grammer but i can comment on rest two, which i have used.mgmat SC
book is a very exaustive book and written in very detailed manner with some great exercises at the end of each chapter. This book is rightly rated as bible in gmat fraternity. A must read for 600- 650 + aspirant.
Aristotle Sc grail is relatively less detailed, absoutely to the point and structured book, thus not as lenghty as mgmat SC
book. If you are running short of time , SC grail would be a better pic than mgmat, however if time is not a constrain , then i would recommend mgmat SC
( again it's my personal opinion)...and if all the time is there, nothing wrong in doing both, first the SC grail and then the mgmat SC
looking forward to comments of fellows on the topic.
Fire the final bullet only when you are constantly hitting the Bull's eye, till then KEEP PRACTICING.
A WAY TO INCREASE FROM QUANT 35-40 TO 47 : a-way-to-increase-from-q35-40-to-q-138750.html
Q 47/48 To Q 50 + the-final-climb-quest-for-q-50-from-q47-129441.html#p1064367
Three good RC strategies three-different-strategies-for-attacking-rc-127287.html