Got these because I've never tried trainers before. I just love the feeling of individual paper cards while packet cutting. These trainers are not the high quality type ones, the 7 different blocks don't even all match in sizes, which makes it hard to split them apart sometimes. They come with protective stickers/layers on them, which are kind of a pain in the backside to remove. The loud click sound would possibly drive most people crazy, but I don't really mind that. Also I'd like to state these may look semi-transparent or even neon glowing in the advertisement pictures, but that's not the case, these are just plain green plasticy blocks. I would recommend sticking to cards or picking up a morr pricey set of cardistry trainers.