I think "best" is a very subjective term. I have never used, nor do I know anyone with a XACT Visor, but I have 2 XACT XTR1 and 2 XACT XTR2 and have 3 friends that have a few of these as well; one also has the XACT XTR7 and they have been 110% flawless; most for nearly 3 years.