I've owned a Miata since 1992. The 2006 is the best ever with a few minor issues. I got the 6 speed automatic -- it works fine in both full and manual automatic but loses some performance to the manual transmission (no surprise). Fit and finish is perfect. AM radio reception is poor -- lots of static; haven't taken it in yet. Fun to drive and looks great. Driver seat is too low for me. Excellent on the highway with the top down and wind buffer in use. 25 mpg on first two tanks of mixed driving. Excellent dealer car knowledge and service.
The ease of putting the top up and down is superb. I'll be top down more with the 2006 Miata. Trunk space is great.