We didn't start Turtle on solids until 6 months, but we've been using this high chair since she was just a few weeks old. Seeing that we have a dog that isn't child friendly, I wasn't able to just sit her on a blanket on the floor when I cleaned the kitchen or made dinner. This was a life saver! I could strap her in here, puts some toys on her tray and talk to her while I cleaned the kitchen, etc. We would have had a hard time finding the floor space for a full size high chair so this one that straps onto an existing dining room chair was just perfect for us. I've heard people complain that it didn't fit on their chairs and was wobbly, but we've never had any problems with ours. We LOVE it!
Around 3 months, Turtle became very interested in stuff, and a playmat was exactly what we needed. It kept her occupied while I took a shower or did other chores (up stairs and away from the puppy). Playmats come in all shapes and sizes... and price tags. From what I can see they are pretty much all the same so we went with a small, inexpensive one.