There's no express rule that only uworld is the best to pass nclex.
I used uworld TWICE and failed woefully. uworld questions are not close to nclex
questions. It only give an extended explanations on why question is wright or wrong
and that itself is overwhelming. Lippincott the point PrepU is far better. i bought it after uworld (Twice), kaplan (x1) and sanders (X2)
Lippincott questions are close to realities of nclex.TRY IT. iT WILL COMPARE YOUR PERFORMANCE with those who took the nclex and
pass/or fail nclex. it will let you know your week points and let you practice your weakest point until you improve or get the concept.
Above all you must pray to God to be able to stay calm because uncontrolled anxiety can affect your performance.

Did u pass?