Pros: 1. The pieces are pretty big, they aren't a chocking hazard whatsoever and they are sturdy as they're wood pieces
2. The colors are vibrant and beautiful
3. they are marked with letters on one side and with numbers on the other side
cons: 1. No instructions, so you have to go back on Amazon to look up the image to put it together
2. they do come assembled and packed, but once you take them out and disassemble them, there's no way an adult can put it together, nonetheless a child. I had to go and look up the main picture to have the doggie back together.
Overall, the quality of the puzzles is good, but they're definitely not 3 and up as it stated on the description. I feel like these can easily get a 3-4-5yo angry because it's nearly impossible to assemble it without looking up the picture on Amazon.