So we bought this for our son who at the time of buying was 12months old. We bought it from Mothercare and they assisted in checking that it was compatible with both our cars via their computer, and after purchasing, fit this product into our car using isofix.
The product itself is as sturdy as imaginable. The isofix really keeps it locked in and so we do not tend to feel the need to use the additional protection from a seat belt unless we go on long journeys. Due to its sturdiness, it can be quite difficult at times to get the actual seat out of the isofix locks. I know that this especially true of Mini's and it can be quite tempting to push it too far in and then hassle to click the red bits and release them. This is mainly due to angles that you are trying from though, and my partner has seemed to got the technique of this and no longer struggle!
The seat is wipeable. We had a few accidents during potty training months but you would never know. We went for all black, as my partner does not like braiding or colour, he likes to keep it simple. And it looks totally classy in the back of our car.
Our child will happily sit in this seat for long periods of time without any fuss. We call it his bigs boys chair and he is very keen to demonstrate. At nearly 3 he is just starting to outgrow this, though we are adamant on keeping him in this for as long as possible due to safety. Up until this age he has showed no interest in playing with the unlocking straps, but now he is growing more inquisitive and he is wanting to explore them!