Positives
The puzzle is attractive with nice colorful letters. It allows the child to learn the alphabet using its smooth tactile memory.
On a positive note, it is true that the letters fit just so you need good traction to use, which is a good point for me, because I bought this puzzle a little more than 3 years, it allows him to work his fine motor skills.
No designs in the rooms, which was a plus point for me because I wanted my daughter focuses on letters rather than drawings, but cons for it had tested the puzzle competitor with drawings that was a slight disappointment .
In negatives
The expedition was a day longer than was indicated on the Amazon site, sending from abroad. But the seller was extremely reliable and quality when I talked with him on a technicality of the product, so to recommend.
The only criticism I had about the product is indeed the lack of symmetry of parts, especially the X whose bars are shorter at the top, but especially the Z which only fits in one direction, with a slight asymmetry almost invisible to the eye and seems more a design flaw volunteer. Not to mention that I saw a pester adult on Z that do not fit when in fact he was trying to get the N. If an adult is confusion, so for a child it would be worse, they would have thought of that .
In conclusion, a colorful game, requiring fine motor skills so rather for older children, with some letters that are a problem, unless the child is smart enough to understand that the letters be tested in several senses. In this case it is therefore an alphabet game for children to 4 years.
