Simple to use. Small footprint and resource friendly, (use it on multiple tracks), transparent (adds no color) and stable (used in PPro, Audition, Soundbridge, and IL Minihost and AIMP Player via DSP plugin to name a few).
This the most reliable and the most transparent master limiter I've encountered, I think it's actually better than the FabFilter or iZotope master limiters. And it's free! Absolutely recommended for anyone working with sound or music.