We recently purchased a brace of Bromtons to use in conjunction with our Cali Beach. We also purchased transport/storage bags for them.
So far we have only used them twice. The last occasion was at the Cali club meet at Stratford where we used them for an outing to a nearby National Trust property with our Cali friends. It was there that we met a jumped up, power crazed, little jobs worth. Apparently, we had committed a major crime as we had entered via the park foot path and on bicycles as well!

I'd just like to say, that as a long term NT member who hasn't ridden a bike for several decades, I was more than a little miffed to be treated in this manner by a repesentative of this great organisation. He made us feel about as welcome as a group of cycling foxes who had just entered his personal hen house. Anyway that's another story.
These bikes are great although because they have next to no springing, Mrs B and I, who are no longer in the first flush of youth, are finding them a little difficult to get comfortable on. So far, both saddles that we have tried, have ended up feeling like we had been perched on a broken house brick after only a short ride. We have now decided to push the boat out and go for a pair of those wonderful old fashioned leather Brooks sprung saddles that were designed for comfort and not for torture.
We have found our Bromtons to be both well designed and well made and IMO, they are well suited to occasional use with a Cali. We didn't want a bike rack on the back, so to be able to load these compact fold up jobs into the relative security of the van (in their bags) is ideal for us. We just need to make the necessary adjustments to the brake handles etc to suit our individual needs and the new saddles of course.
The other thing that has proved to be a challenge are the gears. Our bikes have six gears, operated by two separate levers. We obviously need more practice because just when we have required a lower gear we have both often ended up selecting higher ones. This isn't helped by the different gear changing technique required by each lever. One operates the three hub gears and if I am correct, requires the rider to stop pedalling whilst changing gear. The other lever operates the derailier gears which I think requires the rider to keep pedalling.
Anyway, when the only thing that you can think of is how sore your nether regions are getting, these two different techniques are slightly more than a bear with little brain can cope with.
The only other comment would be the cost. Whilst perfect for Cali use, our "discounted" bikes cost an absolute Kings ransom. We could have purchased five or six quality conventional bikes for a similar price!
P.s We purchased our Bromptons whilst ambling round Tonbridge whilst our van was in for a service at SMG. Whilst not entirely an impulse buy, we hadn't intended to buy them so soon. The service was a free one but the day turned out to be a costly one.