SSQW is a lightweight Spell Queue Window manager designed to help you get the most out of your rotation. SSQW is very optimized resulting in ultra-low 0.001ms CPU cost.
Through optimal usage of SSQW's Smart Mode you can possibly achieve higher dps output and most importantly - smoother rotation. No more double casts of queued ability you wanted to cast once.

Features:

Smart Mode: Automatically sets SpellQueueWindow to your world latency (updates dynamically) + adjustable role-based offset (higher for casters, lower for melee).
Per-Spec Mode: Set individual fixed values for every specialization.
Manual Mode: Simple fixed SQW CVar control.

Commands:

/ssqw ⎯ opens GUI.
/ssqw status ⎯ check current mode status.
/ssqw smart|ps|manual⎯ change current mode.

The values in Smart Mode are my preferred values and should be tested against similar values depending on your role and preference. I suggest adding/subtracting 10-20ms of off default value once or a few times while testing it on dummies to reach desired effect.

I highly recommend installing MiniPressRelease to improve your inputs even more.
Inspired by SpellQueue module from ExwindTools

SSQW - SmartSpellQueueWindow