User blog comment:TheTobarMethod/Do AP's Need A QSS Upgrade?/@comment-5764087-20130904183306/@comment-5556439-20130905223035

Mids arent the only people who buy QSS.

You buy QSS to remove bursts of guaranteed CC.

I spoke in general, Cleanse is a stronger "immunity" esque ability.

QSS is a significantly more efficient and practical one.

QSS gives you a edge in every fight but doesnt guarantee anything, Cleanse can decide that one final game changing teamfight by deterring any and all CC usage on the cleansed target.

You pay for this strength with a long CD.