MSRP is $9.99, which gives us a $0.13 price per piece.
Instructions & Stickers.
Kreon Brawl. Olive green! Plus it has those "tank tread" pieces, that Kreon bazooka, and a 2/3 height 1x1 brick.
Kreon Onslaught. That is quite the smorgasbord, a Clip Tile, a 1x1 Plate w/Double Bar (closed ends), a Clip Plate Horizontal, a 1x2 Plate w/Bar (open ends), a jumper plate, a 2/3 height 1x1 brick, a 1x2 Brick w/Studs on 1 Side, a 2x2 Slope w/1/3 Cutout., and Handlebars. And all the Kreon parts.
Kreon Swindle. A 1x2 Tile, a Lampholder, a new style Headlight Brick, a rounded 1x2 Plate, and a 1x2 Studless Slope.
Kreon Vortex. The helicopter blades are cool,
as is that 1x1 Round Plate w/Vert. Bar.
Parts. We have more of those 1x2 Modified Bricks w/Bar & Technic hole, and they do fit a Technic Pin. Those other 1x2 Modified Plates w/Vert. Clip and some other sort of attachment will fit a bar in the open hole
Can you build a frame, or frames, right away? Yes. The Kreons are good for 4P scale. (+5)
Is it below, at, or above the golden ratio? Above. (-10) (The Golden Ratio is $0.10 per part.)
If you can't build a frame right away, or choose not to, does it have parts you should be able to put into use right away? Yes. (+5)
Does it have more than a handful of immediately useful parts? No. (-5)
Score: B- (-5). This one could be a good army maker at 4P scale. This one does have a wider color selection than the Predaking set.