Have had an FP-730 for some time now. The egg whisk is badly designed as it is so easy for food matter to enter into the body of the whisk and subsequently cause the gears to strip. Simple seals on the whisk shafts would solve this but Kenwood will not accept this. The lid bearing for the processor accessories is also a weak component, which cannot be purchased on its own, as you need to buy the whole lid. Not eco-friendly since this bearing gets a hammering and wears out regularly. Have had to make my own engineering modification to fix this bad design and now it works more reliably. Have written to Kenwood, but they just stick their heads in the sand and come out with the usual mantra "no one else has complained". These days manufacturers build down to a price level rather than up to a quality level, and quality suffers throughout the range as designers get set in a "build it cheap" frame of mind. The product is otherwise good, just spoiled by this lack of attention to design excellence.
I have previously bought Kenwood Chef and was very pleased with product, recently bought FP920 food processor and initially happy with it, first time I used the whisk it broke and frankly quite shocked at the poor quality and 'flimsiness' of it, as not a cheap machine! Contacted their customer support to say how unhappy I am with quality of machine and whisk in particular and asked for replacement whisk as minimum, but as relatively new and had registered etc. I would prefer to return/replace machine. Got a fairly unsympathetic reply saying no replacement would be sent, would have to buy new whisk as I had 'misused' the whisk and pointing me to instructions which says the whisk is only to be used for eggs and sugar only and no reference to my complaint that quality of machine not what I expected from Kenwood and price.
I accept I hadn't read instructions, I guess I expected a food processor, particularly a Kenwood costing over a £100 to be able to whisk soft butter and sugar! which I don't think is unreasonable! Frankly, I have seen better quality plastic whisks on a child’s toy, so this, along with unsympathetic response to me as a previously happy Kenwood customer, means I shall not be buying a Kenwood again!