We have had 4 now. The latest is a little, lightweight, gem of a sports car. My current is a Mk4 2ltr roadster with skyactiv suspension and many toys. The engine sounds like a tractor, but has plenty of low down torque, to get you past those 4x4s. Fastest mx5 by some way, of those I have driven. The electronic steering is tuned to perfection, much sharper than previous models. The suspension is lithe and the whole car comes alive in your hands when driven properly. As a driving machine it is lots of fun.
The suspension is also pliant and comfy around town. The fuel consumption is other wordly after running an ///MR. Easily twice as good, when pushing on. Sixth gear is great on the motorway. Previous Mx5's only had 5.
As a car it had it's foibles. The boot space is tiny, after the MR and less than in my wifes folding HT mk3. The room in the cabin is also tight. Being 6ft 4" I probably notice that more than most, but again it is less than older models I have driven. Plus there is no glove box, which is a PITA and means my hat and gloves are in the boot when I need them. The engineers went to town saving weight, Even the bottom of door glass is drilled out. Alas than means some bits are fragile. I caught the passenger door mirror on the garage door pillar, reversing out. It literally exploded. I had done the same thing a couple of times in the ///MR and it just folded back in place both times.
The Mk4 is fully loaded with toys, it doesn't need. If you like toys then you will have hours of fun learning them. I simply enjoy classic FM.
So to round up. The perfect car for a day out driving B & C roads or nipping across the county for a pub lunch. Not a car I would buy to go on a European tour in though. For that the ///MR was far more suited.
Hope you find that useful.