Best performing bat I own, have ever used. Gray nicolls kaboom players edition. Has grapping and a big chunk of heartwood.
Up highly in my rated list, - g2 H4l half heartwood with grapping, several B3 butterflies(infact my club has about 11 of them and all perform very very well) some grade 3 kookaburras(old and new)
I've had a few g1 bats that went well, b3s, H4l, affinty etc.
On the other end of the scale I've had some cheap G3 plank from gray nics and GM, but I've also had a few high end plans with perfect grains from GM.
I prefer a bat to have character but in my opinion non of it means performance!! Either get from a reputable seller and or maker, who will back the bat.
Or get to the shop and have a try. Should easily avoid a plank then. Regardless of grade and markings.