I went from iPhone 5>S4>Note 3...
The i5 to the S4 was seamless for me. The N3 is taking some getting use to due to the what I feel are rough edges which would be mitigated by slapping a case on it. The clarity is just astounding on the N3. Stark difference between the S4 and N3, almost as if they coated the screen with some sort of filter prior to the oleophobic coating. The size is a non-issue for me as I have relatively large hands.