Linda Cantello brushes are really nice but i am not a fan of double ended brushes. You cant store them upright or in pockets, only flat. Other than that, this is a nice brush. The flat liner side is almost identical to the Smashbox liner brush. Same width, white bristles, same stiffness. Works well to get a thin straight line near the lashes. The other end has a thin blender, which can be used for smudging out the liner. Works well with gel liners too. THe quality of the brush is excellent. Does the work it is intended to do and has a nice white pearlized handle. I would not repurchase due to the double sided thing but if you like that, then this is a nice brush.
This is a long double ended brush consisting of a flat, narrow synthetic brush at one end and a small, soft eye blender at the other. The flat liner is simply the best push brush I have ever used. It draws an incredibly thin line, like a freshly-sharpened pencil, and is stiff, so it doesn't splay or lose its shape. You can push color right into the lash roots with this one without creating any obvious line at all. The stiffness makes it too harsh for anything but push application, so it is a specialised tool, but a good one. It works well with both powder and cream shadows, and you can draw a pencil across the tips in order to push pencil color into the roots too. The blender end is much slimmer than most blender brushes, so ideal for working on fine lines when you only want to smudge them out a little. It is very soft and easy to use. It can also be used for lining when you want a diffuse, smudgy effect (it's too soft for precise lining). A great duo, quite expensive, but you are getting 2 brushes for the price.