Quick summary: this product is not fit for purpose and has safety defects. The company who supplied it, KMS Distributions, are as unhelpful as it is possible to be,
The first time I used this product I used it in the scaffold position with the support trays on top. They appear to lock in place. In fact they do not. I was moving along the platform and my foot went straight through between the rungs, and I fell heavily onto the ladder. Inspection shows that with weight on the ladder, the sag in the middle means the locking prongs no longer engage and the trays are free to move (see photos), meaning an accident is almost inevitable. The side stabiliser, an essential safety feature, broke - it is thin aluminium and not fit for purpose. Please inspect these photos carefully before purchasing this product.
The company, KMS distributions, were utterly unhelpful, asking for the product to be returned before providing a refund, but not refunding the cost of return. I feel doubly annoyed because B&Q sell a similar product at a similar price, and I should never have dealt with such a rubbish company as KMS distributions.