I bought 2 orders of these, at £75 a pack, so x4 chairs in total.  After receiving two replacement parts for one chair (original arrived broken and 1st replacement was the wrong colour), which Wayfair dispatched quickly and without issues, another of the chairs broke today along the wood under the seat. This is after less than 3 weeks of occasional use from mainly just my daughter who's not yet 2 years old and myself at 50kg. My partner (top end of weight limit of the chair but still under) sat down and we heard a crack. 

The remaining two chairs do not feel stable and this item is not suitable for purpose.