I've mentioned my Mezzo on here before - still got it and still very, very happy with it. Bought it through the cycle-to-work scheme so saved looooads of money.
It solves the three major design 'issues' with the Brompton, namely:
1. Steering geometry. By putting the dogleg just above the front wheel it gives you the steering arc that means it doesn't handle like a kid's scooter, and still folds nice and small.
2. Freewheel. Nice and quiet with hub gears, rather than a noisy Brompton ratchet freewheel.
And the proper USP is:
3. The (decent, aerospace, standard) self-locking catches that hold it all together and make it into a proper rigid structure. Bromptons always seem to ride like the back is broken, and that little catch-thing isn't really a robust solution, especially when bumping around towpaths.
I really wanted to like Bromptons: with a £1k budget on the Cyclescheme it was at least worth a go, and I tried four different models out of the thousands of possibilities. But I couldn't get on with them, for the three reasons above.
And at least the Mezzo is British: shame it's from Cambridge, tho...