Dry grip, braking and road feel are decent but a lot less capable than Michelin Pilot Sport 5.
Point and case, I've attended an all Miata track event where I managed to be a full 5s faster on a 2 minute track than the next ND3 MX-5 which was also a lot lighter since it was the soft top version and the driver was around 30kg lighter than me. Driving and track knowledge were not a factor since the other driver is arguably more experienced than I am when it came to that circuit and the definitive factor was the tire set.
Confort was quite poor. The MX-5 itself isn't the ride filtering vehicle but these tires didn't help. After exchanging them to the Michelin ones, the bump in confort was imense. It's likely the stiff sidewalls are the culprit.
The best and most surprising thing about the Bridgestone was wear. Even though the car was driven quite sporty most of the time, after 12-13k km usage, the rear tires only lost 4mm and the front 2mm. This was very unexpected and might be a definitive factor for a lot of people.
If living in a country with general good weather, with quality road infrastructure, this set should definitely shortlisted. Just be careful in the wet and don't hope for competitive results on track.

