I think it's envy or jealousy that most people have an issue with Kleins. Yeah bought & ridden bitd by people with plenty of funds. The paint jobs may be marmite, but you can't deny they were a fantastic ambassadorial product for our hobby.
Quite frankly, thinking of what the UK had to offer, no one made anything that could match the unique appeal that a Klein had. And despite me being very fond of handbuilt steel frames, alu is harder to work with so I don't really agree with statements that alu is inferior or lesser than something made of Reynolds gas pipe.
I'm not saying Klein's were the best, just glad my eyes were graced to see a few bitd.