I bought this for my 18 month old son. He loved standing in the fun pod near the kitchen counter so he could see what I was doing, he'd often stand by it and "demand" to be put in it. Its height adjustable and I felt he was safe in it, its very sturdy with big "feet". Its easy to put together and the instructions are really easy to understand.
I was really pleased with it at first, and we used the high chair lots. The cushion is fabric and often slips down as the elastic doesn't really keep it on the chair properly, I didn't feel this was all that safe to be honest as when he's in the high chair, you don't want them slipping down - it does have a harness to prevent this. When it's used as a low chair again he slips down in it, and its easy to push over the chair. So if you had a toddler and a baby I would worry that the toddler would push the baby over!
I'd had the fun pod for only 2 weeks when one of the screws went and one of the bolts which meant I could only use it as a high chair. I was really disappointed as my son really liked playing in it, I'd probably consider buying the proper fun pod, rather than the high chair version as it seemed really good quality - perhaps they've tried to add too much to the original product.