Test drove the ND a few days ago.
Pros
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+ Awesome steering feel.
+ Convertibles are fun in the sun.
With the top down it wasn't hard to talk to the passenger at highway speeds.
+ Best looking Miata for sure. Sure it's a bit try hard in the manly department, but in person it works. (I'm not a Miata purist, so others may hate the new look).
+ Grand Touring model (the one I tested) has a nice interior for a a $30k Japanese car. Way better than say a WRX or BRZ.
+ The car feels more exciting in the turns at low speed due to the almost comical body roll.
+ Track days would be very economical. Save on gas, brakes, tires easily.
Cons
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- It's slow.
- It's really slow.
- Like the BRZ felt like it could use a turbo, whereas this feels like it could use a heartbeat.
- It's cramped. I'm 6'0 and I felt like with the top down I'd be smoshed, forget wearing a helmet with top down.
- It's impractical for anything other than a weekend car. No trunk space. You want the top down so no bad weather driving.
- Not many extra features (infotainment, etc.)
- Sure the body roll makes the 40 MPH turn you made feel more exciting, but also feels kind of concerning. A car all about handling shouldn't be so spongey in the turns. I'm projecting (since I didn't test it on the track), but a real high speed turn might freak you out on a track day.
Verdict
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I'd buy it. It's a ton of fun. It's a joy to drive. It feels like a baby Cayman/Boxster for half the price. Would I buy it over a used Boxster? Honestly It depends on what you're looking for. Want more luxury and more acceleration? Get the Boxster.
It's way too similar a car to my Cayman GTS to purchase as an additional car for me though (not that I'm looking anyway). The Cayman does everything the Miata does, but way better (for triple the price obviously).
Bottom line. Great car even if it's slow as lava. Probably better that way for ticket avoidance and track days though!