We have two slimline dishwashers. Seems like a good compromise as it only takes 1.5× the space of a full size.
A few people have said that they'd never cope with slimines as their stuff would never fit, but I really don't see the issue. If they mean they have individual items that are too big, I'd like to know what they are. Everything from our biggest roasting tin and pasta cooker saucepan down fits in ours.
And if they mean they would have too many plates etc. for a slimline, well, that's the whole point of having two. You put one on when it's full!
If you have room, I think two actual dishwashers, even slimline ones, is better than one of the F&P ones with the drawers. For one thing, they're really expensive. For the £1500 price tag I could get six slimline dishwashers. There's absolutely no way the F&P one is going to be so much more reliable and long-lasting that this price tag is justified.
Also, if you have two separate dishwashers and one breaks down, you still have the other while you wait for a repair. When your F&P eventually breaks down, which it will, then you lose your only machine.