Fun to drive, good fuel economy, reliable. This is my second Miata, they make great commuter cars as well as fun weekend toys - they're reliable, the handling is great, and the look good. They are smaller than a typical sedan, so they don't have a lot of interior space or luggage space. Obviously, you should make sure you fit comfortably and can see out of it before buying. Similarly if you have to haul kids around, or a lot of parcels every day, then a two seat roadster might not be the right car for you. Fuel economy is pretty good, I'm getting mid-20's to low 30's depending on how much town and open road driving I'm doing. It's not the highest mpg rating but it's pretty good for a sports car.
I have a 2002 MX-5 LS. This is one sweet ride. Like the old MGB's and Triumphs without the reliability issues. I've owned 2 other Mazda's in the past 15 years and never once had a mechanical problem other than routine maintenance. I don't understand the posts about "loud road / wind noise". It's a convertible! If you are screaming down the interstate at 90, yes it's loud. If you're driving 45/55 like you should be you won't notice a thing. It is fun to drive. It is fun to ride in. It is fun to sit in. It is fun to look at. It is a great car.....I love this car.
This is my fourth Miata - I have driven them since 1995. I really enjoy driving Miatas, and my latest one that I purchased this year is even better than the earlier ones. Very smooth ride, but what I have always liked best is the responsiveness of the steering and acceleration and the really good excellent way it holds the road on turns and curves. My current Miata is my first retractable hardtop and I like the convenience. I was pleasantly surprised to find a bit more trunk space in this car over its predecessors. People have started conversations with me about the car in parking lots and so forth which is a very pleasant experience. Good on gas, and among all four of my Miatas I have needed almost no repairs.