[1996 328ti]

I had a California Roof on my 98. I really miss it.
It is well insulated. A bit noisey when open but what would you expect from a big hol ein the roof. The California Roof was better in 98 and 99 because it used a popup windscreen.

I never went through the car wash but I would see no problem not to.
Having the roof made cleaning the car that much faster since I did not have to wax it.

If I found another 98 California Rood I'd buy it.
If you plan on doing any track events, some clubs consider it as a convertible and some don't.