I have been riding folders for the past 14 years. I have a Bike Friday New World Tourist and a Tikit. I had wanted to buy a Brompton for years now, and my wife finally bought me one (P6R) for Christmas 2018. I have had the Brompton for a year now, and I love it. It has a surprisingly good ride and is very nippy in its handling. The gears take some getting used to, but now that I have the hang of it they are fine. I took the Brompton out for a 44-mile ride yesterday and it was pure bliss.
What is best about the Brompton is taking it on trips. Like the Bike Friday it fits into a regulation suitcase, but unlike the Bike Friday it can be assembled and ready to ride in just 10 minutes, as opposed to an hour or so to assemble the Friday. In 2019 I took my Brompton to southern France and to Greece, and am looking forward to taking it other places in the years to come.
The Brompton may seem expensive (my rig, with rear rack, mud guards, and dynamo light, cost US$2,000), but it is equivalent in price to a kitted-out Bike Friday. By the way, make sure you get the front bag block and the rear rack; not getting them is false economy.
Don't let the cost deter you... the Brommie is well worth it!