haha i just got my new rubik's brand White DIY and it is surprisingly a great speedcube! it came with "Rubik's" cube lube.
it also cuts corners really good if you set the tension right. and the sticker quality is great
the other brand cubes are very convincing but i like to stick to rubik's brand cubes. unless i want a bigger cube like a V-cube. id buy that haha. Also the rubiks White DIY hasn't popped yet for me