The Miata is certainly a learning experience.
I have just been informed my Miata's A/C has a massive refridgerant leak; and even if it didn't there is no insulation on the piping so the "fresh air" is getting heated by the engine and is hotter than ambient.
I have also noticed that my rear glass is coming unbonded and is tearing and it is leaking badly. Putting it up and down makes the tear and leaking worse. So i can either get drenched in sweat or drenched in rain. This is not ideal.
Do not buy the first Miata you drive. Do not fall in love. Always be ready to walk.