@slicknick
I think without Jeremy Clarksons typical hyperbole when it came to the Z8, it wouldn't be remember so badly. He slated it as not being a sportscar, then they put the smaller engined, automatic Alpina Z8 around the track, and it was as fast as the Lamborghini Murcielago, which cost twice as much - so it was very capable - even if it wasn't the nicest to drive, and to be fair it didn't get great reviews - but it didn't get terrible reviews either. I think the harshest valid criticism is that it was disappointing, and I do blame BMW a bit for that - as with the 8 series, BMW were happy to let people think it was supposed to be a sportscar even though they'd never engineered it to be... but disappointing doesn't equal bad. Who here would honestly take the keys to a 2003 Z3 1.9, over a 2003 Z8?
So, having said that, in the interests of being fair... I'm not sure what car people
wouldn't take the keys to an Isetta over.
.. however, if you were to judge the Z8 as a dismal failure based on its commercial success, then we have to consider the Isetta a monumental triumph, as without it there probably wouldn't be a BMW today. If one model was pivotal to the companies success, it was the Isetta for BMW in the 50's. Whatever the Isetta's shortcomings/features were, people bought them as cheap affordable transport and it help saved the company from bankruptcy - so yeah, a pretty bad car, but for what it's given us since, "worst" seems a bit unfair...