We took delivery of this earlier today and have sent it straight back.
The top of the step stool doesn't lock securely into the base. My son almost had an accident as the top slid off the base and he fell over.
The bottom of the toilet seat is very small and floats above your own toilet far too freely.
No instructions or documentation were supplied with our product.
It might be OK in potty mode but that's not why you are spending this sort of money. I don't normally bother with reviews, but given the safety concerns this product actually makes me a bit angry.