We bought these for our 4 month old son and he really enjoys the pictures and most of the textures are easy for him to reach out for and touch.
We use them almost daily with him and he responds well, mainly to the animal cards but appears to be intrigued by the pictures and textures.
If there was one thing I'd complain about is the limited feel of the textures on some of the cards. It's a bit redundant, especially on the keys and the car. It's a flat shiny, not vey textured feel so not as enticing for our little one. Otherwise, we really enjoy showing him each card and he's always reaching out to feel the textures.