If the CS master is free(!), then go for it.

If you have to pay -lets say- 30.000 bucks, rethink.

The additional time of being student will open you newer doors, than if you are already working - assumption: IF the CS master is free, otherwise it may not pay off

Being a student is a huge privilege in most countries accordings to different costs/fees/taxes - so I recommend everyone to keep this status, as long AS IT IS FREE and legally possible.