Has anybody used this line?  Im a huge fan of pline cx . Gonna pick some of this up for my shakey head rod maybe.  Any thoughts?

Pline mono is great but their Halo fluoro is junk. I had a friend that constantly broke off using Halo. Better off getting Seaguar InvizX or AbrazX.

I like the Halo personally. It is expensive so i only use it on my tournament set ups. I use 20lb mono for backing and use half (+/- 100 yards). I use 15-20lb Halo and haven't had any problems with break offs. It does have a lot of memory so I keep the KVD conditioner or Reel magic handy.

I also use the Seaguar InvisX and really like it. It is as smooth as silk and casts really good.   I use 10-15 lb on everything from shakey heads to jigs.  You have to watch for knicks and abrasions with all flourocarbon. Also if you are constantly backlashing you will weaken the line when pulling those out and therefore causing breaks. I haven't had a fish break me because of the line failure but I have seen times when the line breaks due to not checking it, constantly backlashing, and or other issues related to the fisherman. 

I use it and like it. I've never broken off a fish with it.